You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you for today?

USER: I want to cancel my reservation, can you help me in this?

ASSISTANT: Yes sure. Can I know your name?

USER: Joshua Clark.

ASSISTANT: Ok. Wait a minute. I will check. Sorry Joshua, there is no reservation with your name.

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

ASSISTANT: Most welcome.