You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, may I know your name?

USER: Ok, my name is Benjamin Harris.

ASSISTANT: Sorry, there is no active reservation on your name.

USER: Ok, not an problem.

ASSISTANT: Thank you.

USER: Thank you for your help.