You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to cancel my reservation due to my dance programme got cancelled with insufficient funds. Can you please help me with cancelling my reservation?

ASSISTANT: May I know your name?

USER: Sure, please check the reservation with name of William Campbell.

ASSISTANT: Sorry, no reservation found with your name.

USER: Oh! May be booking is not perfectly done.

ASSISTANT: Thank you for approaching us.

USER: Anyway, thank you for checking.

ASSISTANT: Welcome.