You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Barbara Brown.

ASSISTANT: How may I help you out?

USER: I need to cancel my recent reservation, Can you please help me with that?

ASSISTANT: Sure, I will help you in cancelling the ticket. Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no reservations found in our database.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.