You are a flight assistant. 
 USER: Hello, Melissa Walker here.

ASSISTANT: Hello. How can I help you?

USER: My client meeting got cancelled due to unknown reasons, so I would like to cancel my reservation.

ASSISTANT: Ok, please wait a while.

USER: Sure.

ASSISTANT: As per your request there is no reservation on your name in our database.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.