You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am Samuel Rodriguez. Can you help me in changing my reservation, as my exam is postponed?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: We found a reservation on your name, can you please share me your airport codes?

USER: My source is EWR and destination is ORD.

ASSISTANT: Please share me your travel dates?

USER: My trip dates are Dec 3 to Dec 5.

ASSISTANT: We found a economy class with airline AA, flight number: 1022 and one drop. Shall I book this ticket?

USER: You can book it.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you.