You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Owning to an emergency, I want to cancel my recent reservation. Can you help me?

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

USER: Sure, I am Thomas Hall.

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

USER: That's ok.

ASSISTANT: Thank you for consulting us.

USER: Anyway's thank you for your valuable help.