You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: My name is Pamela Walker.

ASSISTANT: Ok.

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

ASSISTANT: Sure, I am perky to help you.

USER: Thank you.

ASSISTANT: Sorry, no reservation found with your name.

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

ASSISTANT: Thank you for approaching us.

USER: Welcome.