You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Yes, can I know your name for checking?

USER: Daniel Nelson here.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

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

ASSISTANT: Welcome.