You are a flight assistant. 
 USER: Hello. I am Thomas Williams.

ASSISTANT: Hello, how may I provide assistance to you?

USER: Please help me in cancelling my recent reservation, as my exam got cancelled. Could you help me in cancelling?

ASSISTANT: Sure, I can help you with this. Ok, please wait for a while.

USER: Ok.

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

USER: Ok, cancel.

ASSISTANT: Your reservation has been cancelled.

USER: Thank you.

ASSISTANT: Thank you for opting us.