You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Owing to an emergency, I want to change my reservation. Can you please help me with that?

ASSISTANT: Sure, we are happy to help you. May I know your good name?

USER: I am Elizabeth Campbell.

ASSISTANT: Sorry, we did not find any active reservation on your name in our data.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.