You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to change my existing reservation due to bad weather condition, can you please help me with that?

ASSISTANT: Sure, we are here to help you. Can I have your name to proceed further?

USER: My name is Timothy Jones.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: We found a reservation on your name, kindly mention your new airport codes?

USER: My source and destination airport codes are LAX and AUS.

ASSISTANT: May I know when you are willing to travel?

USER: I want to fly on Apr 02, return on Apr 04.

ASSISTANT: Are you looking for any preferred connections?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications to be met?

USER: No.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We have found a American airlines, flight number-1002 class-economy connections-1 and fare is 100. Shall I proceed to change your reservation?

USER: Ok, proceed to booking.

ASSISTANT: Sure, your reservation has been successfully changed.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.