You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Is this flight ticket booking agency?

ASSISTANT: Yes, you are at right place. How may I assist you today?

USER: I want to change my reservation, because I have another important work on that, can you help me?

ASSISTANT: Sure, I will help you on that.

USER: Thanks.

ASSISTANT: Could you please provide your name to check your reservation status?

USER: Sure, my name is Barbara Jones.

ASSISTANT: Ok Jones, please be on hold to check.

USER: Ok.

ASSISTANT: We regret that, there is no reservation found with your name in our records.

USER: It's ok, no problem, may be I am not booked properly at that time. Thank you for your information.

ASSISTANT: Thank you for approaching us, have a great day.