You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER:  I am Sharon Thomas want to cancel my reservation due to prepone of my meeting. Can you please help me with it?

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: We found a reservation with your given name, shall I proceed?

USER: Ok proceed.

ASSISTANT: Your ticket has been cancelled. Amount will be credited in your bank account within four working days.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.