You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Owing to an emergency, I want to cancel my reservation. Can you help me out?

ASSISTANT: Can you please tell us your name, so that we can check your reservation status in our website?

USER: Sure, my name is Gary Walker.

ASSISTANT: Walker, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Walker, I have not found any reservation by your name in our website.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for choosing us and have a nice day.