You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am David Taylor.

ASSISTANT: How may I assist you now?

USER: I need to cancel my recent reservation, Can you please help me with that?

ASSISTANT: Sure, please hold on.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry to say that there was no reservation on your name.

USER: Ok, no problem.

ASSISTANT: Thank you for picking us.

USER: Thanks for your information.

ASSISTANT: Have a nice day.