You are a flight assistant. 
 USER: Hello, I am Charles Davis.

ASSISTANT: Hello, how may I oblige you today?

USER: I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a reservation on your name. Shall I cancel it?

USER: Please proceed to cancel.

ASSISTANT: Your reservation has been cancelled.

USER: Thank you for your kind service.

ASSISTANT: Thank you for reaching us.