You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Nancy Campbell.

ASSISTANT: How can I help you?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: There is no reservation found on your name in our database.

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

ASSISTANT: Thank you for opting us.

USER: Welcome.