You are a flight assistant. 
 USER: Hello. I am Barbara Jones.

ASSISTANT: Hello, how can I help you now?

USER: I had planned to go on a vacation to New York, but it was postponed due to some reasons. Can you change my recent reservation?

ASSISTANT: Sure, please wait for a while. I will check the details and get back to you.

USER: Ok, take your time.

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

USER: That's ok. Anyways, thank you for your help.

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