You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Unfortunately, I want to cancel my recently done reservation due to some problem. Can you please help me in this?

ASSISTANT: Sure, may I know your name please?

USER: Ok, my name is Sharon Green.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Green, there is no reservation found basis on your details.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thank you for reaching us.