You are a flight assistant. 
 USER: Hello, I am John Hall.

ASSISTANT: Hello, how can I assist you?

USER: Due to the bad weather the match has been postponed. Can you please change my existing reservation?

ASSISTANT: Sure, please wait a moment I will check and revert you.

USER: OK.

ASSISTANT: We found a reservation in your name. May I know your new journey details?

USER: My airport codes are LAX to IAD. I start on 04/04 and return 04/06. The price should not exceed 200.

ASSISTANT: We found a flight with Hawaiian airlines of 1010 flight and price is 100. Shall I proceed to booking?

USER: You can proceed for booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for the help.

ASSISTANT: Thank you,have a nice day.