You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Catherine Roberts.

ASSISTANT: How can I help you?

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

ASSISTANT: Sure, just a moment please.

USER: Ok, take your time.

ASSISTANT: I am sorry no reservation found on your name.

USER: It's ok, thank you for checking.

ASSISTANT: Thank you for contacting us.