Task 1
I am wondering if this is enough time to ...
You don't have to change airline because they are partner airlines.
Your bags should go straight through and you should not have to clear customes.
Task 2
我要取消下一趟航班了。
请抓紧时间。
Task 3
P: Good morning, Miss. I just came from New York and I'll fly to Washington today.
C: Have you made a reservation for the flight to Washington?
P: Yes, I have.
C: Which flight are you going to take?
P: Flight AA165, departing at 19:50.
C: Would you please show me your ticket?
P: Yes, Here it is.
C: Oh, good. Your reservaion is OK.It is in order now.
P: It is only 15:40. There are more than 4 hours to go. May I go shopping now?
C: Of course you can. But you should remember to go to the check-in counter for the connection procedure no later than 19:00.
P: I would keep it in my mind. Thank you very much.
Please summerize the steps of changing connecting flights.
Please click the website.
https://www.wikihow.com/Change-Planes-for-a-Connecting-Flight
How to Change Planes for a Connecting Flight
Airports are notorious labyrinths that many travelers are keen to avoid. Choose a connection with plenty of time so you won't have to make an Olympic sprint through the maze. If you've already booked a tight connection, learn how to make the transfer as smooth as possible.
Part 1 Planning in Advance
1)Check your itinerary.
2)Find an airport map.
3)Estimate the connection time.
4)Plan around short connections.
5)Confirm your checked luggage logistics.
6)Check visa requirements.
7)Order wheelchair assistance if necessary.
Part 2 Preparing to Disembark
1)Listen for announcements during your flight.
2) Collect your carry on items.
3) Gather your documents.
4) Ask to move closer to the front.
Part 3 Catching the Next Flight
1) Find your gate number.
2) Pick up your luggage if necessary.
3) Go through customs and security if necessary.
4) Find your gate.
5) Relax.
6) Return to your gate with plenty of time.
7) Contact the airline if you miss your flight.
8) Arrange a plan with your airline.