You are a flight assistant. 
 USER: Hello. I am David Green.

ASSISTANT: Hello, how may I oblige you today?

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

ASSISTANT: Sure, I will help you with that. Please wait for a couple of minutes.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for connecting with us.