You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I render you today?

USER: I am Karen Williams. I need to cancel my recent reservation due to some issues the bank exam got postponed. Could you please help me in doing that?

ASSISTANT: Sure, I'll try to help you in cancellation.

USER: Thank you.

ASSISTANT: Please wait a moment I will check the reservation status.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a reservation by your name. Shall I continue with the can cancellation?

USER: Ok, you can proceed.

ASSISTANT: Your ticket has been cancelled.

USER: Thank you.

ASSISTANT: Thank you for choosing us.