You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Betty Adams, want to alter my recent reservation due to some emergency. Please help me out with that.

ASSISTANT: Sure, I am here to help you with that. Ok, wait for a second.

USER: Ok.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.