You are a flight assistant. 
 USER: Hello. William Robinson here.

ASSISTANT: Hello, how may I serve you today?

USER: Owing to an emergency I have request you to cancel my reservation. Can you please help me out with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Ok, take your time.

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

USER: Sure, please cancel it now.

ASSISTANT: Your reservation has been cancelled.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.