You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be at your service today?

USER: Can you please help me to cancel my existing reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Joshua Davis here.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry, we could not find any reservation on your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for approaching us.