You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I am Richard Miller, want to cancel my ticket, because my friends cancelled the tour due to some problem. Can you help me?

ASSISTANT: Sure. Wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting. There is no reservation found on your name.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you.