You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Catherine Miller.

ASSISTANT: How can I help you today?

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

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Please, give me a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, we have not found any reservation on your name in our records.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for choosing us.