You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ronald Allen.

ASSISTANT: Can you please tell me how may I help you?

USER: Actually, I want to cancel my recent reservation.Can you help me out?

ASSISTANT: Ok. Sorry to say, no reservation found on your name.

USER: That's fine. Thank you for your help.

ASSISTANT: Thank you for contacting us.