You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, can you please provide me your name?

USER: Yes, I am Catherine Collins.

ASSISTANT: Sorry, there is no reservation with your given name.

USER: That's fine, no problem.

ASSISTANT: Thank you.

USER: Thank you for your help.