You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Actually I planned to give a small party to my friends but some of my friends are no attending, so I need to cancel my recent reservation.  Can you help me?

ASSISTANT: Sure, can I have your name for further process?

USER: Yes, I am Larry Harris.

ASSISTANT: Sorry Larry, no reservation found on your name.

USER: It's ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.