You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gary Walker.

ASSISTANT: In which way I can help you at this moment?

USER: Can you help me cancelling my recent reservation?

ASSISTANT: Sure, I am happy to help you with that. Please wait a moment.

USER: Sure.

ASSISTANT: There is no previous reservation available under your name.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.