You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Robert Gonzalez.

ASSISTANT: How can I aid you?

USER: Owing an emergency want to cancel my reservation, can you help me with it?

ASSISTANT: Sure. Please wait a while.

USER: Ok.

ASSISTANT:  Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to cancel it.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.