You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Barbara Brown, want to cancel my recent reservation due to some personal problem. Will you please help me with that?

ASSISTANT: Sure, hold on for a moment please.

USER: Sure.

ASSISTANT: Sorry to say this Brown, there are no tickets reserved on your name.

USER: Oh! It's ok, thank you.

ASSISTANT: Thank you for reaching us.

USER: My pleasure.