You are a flight assistant. 
 USER: Hi, I am Scott Martin.

ASSISTANT: Hello, how can I serve you to day?

USER: I need to change my existing reservation, can u help me with that?

ASSISTANT: Sure, please wait a moment, I will check the reservation is there are not.

USER: OK.

ASSISTANT: We found a reservation on your name. Could you please provide me your new travelling details?

USER: New reservation departs from New York, NY - EWR on 06/27 to Oakland, CA - OAK on 06/29.

ASSISTANT: Please give me a moment.

USER: Ok, please go a head.

ASSISTANT: Thanks for waiting, we found no flight on your details.

USER: Ok, thanks for such a great response.

ASSISTANT: Thanks for choosing us, have a good day.