You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I need to cancel my recent reservation due to my scheduled examination dates has been postponed. Can you help me in cancellation?

ASSISTANT: Sure, may I know your name?

USER: I am William Hall.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: We found a reservation on your name. Shall I cancel it?

USER: Ok, please proceed with the cancellation.

ASSISTANT: Your reservation has been cancelled.

USER: Thank you for your help in cancellation.

ASSISTANT: Thank you for approaching us.