You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you help me to change my reservation to next week? Because my exam is postponed to next week at Chicago.

ASSISTANT: Sure, may I know your name?

USER: My name is Edward Martin.

ASSISTANT: Please hold on for a while.

USER: Ok.

ASSISTANT: We found your reservation, could you share your itinerary dates?

USER: My travelling dates are 03/19 and 03/21.

ASSISTANT: May I know your airport codes?

USER: My airport codes are BOS and ORD.

ASSISTANT: Please hold on for a moment. Frontier airlines with flight 1005 is available.

USER: Proceed with booking.

ASSISTANT: Your ticket is confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.