You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am Larry Turner. Can you please help me in changing my existing reservation, as my exam got postponed to some other date.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: We found your reservation. Please share me your trip dates.

USER: Sure, my new trip dates are April 14-16.

ASSISTANT: May I know your source and destination airport codes?

USER: My airport codes are SEA to IAD.

ASSISTANT: Do you want to travel in connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: Please share if you want to travel in any specific time?

USER: I want to depart and arrive in the afternoon.

ASSISTANT: Do you like to go with a economy class or business class?

USER: I am comfortable with any class.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: We found a JetBlue airline and 1014 is flight number with a fare of 200. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for communicating with us.