You are a flight assistant. 
 USER: Hello. I am Andrew Lee.

ASSISTANT: Hello, how may I help you?

USER: I want to change my existing reservation due to postpone of my exams, can you help me with that?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: We found a reservation with your given name, please share your new travel dates.

USER: My travel dates are Oct 12 and Oct 14.

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

USER: My airport codes are LGA and ORD.

ASSISTANT: Can you please share your connection limit?

USER: My connection limit is 1.

ASSISTANT: May I know your depart time and return time?

USER: I would like to return back in the afternoon time.

ASSISTANT: Do you have any other requirements?

USER: No, thanks for asking.

ASSISTANT: We found a JetBlue airline, flight number: 1005, return time: 19:00PM, price: 100 with one connection.

USER: Please proceed to book my flight ticket in this airlines.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.