You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in cancelling my reservation?

ASSISTANT: Sure, may I know your good name please?

USER: I am Gregory Edwards.

ASSISTANT: Wait a moment.

USER: Ok.

ASSISTANT:  Sorry, there is no reservation found for the user name in our back end to cancel it.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.