You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Barbara Perez. I would like to cancel my ticket. Could you help out?

ASSISTANT: Sure, please wait for a while.

USER: Sure, please take your time.

ASSISTANT: Sorry, there is no reservation found by your name.

USER: Ok,, no problem. Thank you for the help.

ASSISTANT: Thank you and have a nice day.