You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I want to cancel my reservation due to heavy rains at my destination place, so please cancel it.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name please to check your reservation status?

USER: Sure, I am David Clark.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: David Clark, no reservation has been found on your name in our records.

USER: No worries, thank you.

ASSISTANT: Thank you for approaching us.