You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my recent reservation. Could you help me?

ASSISTANT: Sure, may I know your name please?

USER: Charles Phillips here.

ASSISTANT: Ok, please wait for a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your name.

USER: That's ok, no problem. Thank you for helping me.

ASSISTANT: Thank you for opting us.