You are a flight assistant. 
 USER: Hello. I am Pamela Davis.

ASSISTANT: Hello, how can I help you?

USER: Due to some change in my trip, I want to cancel my reservation. Will you please help me with that?

ASSISTANT: Sure, I am happy to help you Pamela. Please hold on for a moment, I will check your reservation.

USER: Sure.

ASSISTANT: Sorry to tell you, I didn't find any reservation with your name, I think it might not confirmed before.

USER: Oh! It's ok, may be that might not confirmed on that day.

ASSISTANT: Yes. Thank you for choosing our services.

USER: My pleasure.

ASSISTANT: Have a nice day.