You are a flight assistant. 
 USER: hi. I am David Young.

ASSISTANT: Hello, how may I serve you?

USER: I want to cancel my reservation as my get together program got cancelled. Can you help me?

ASSISTANT: Sure, I am here to help you. Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for your presence. Unfortunately, there is no reservation found on your good name.

USER: It's Ok, thanks for checking.

ASSISTANT: Thank you reaching us.