You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Elizabeth Thomas, I want to change my existing reservation because I have done wrong dates in booking my flight ticket. Can you please help me about it?

ASSISTANT: Sure, on what name can I proceed for finding a reservation?

USER: Please, search a flight ticket reservation under my name Elizabeth Thomas.

ASSISTANT: May I know your dates want you to change?

USER: sure, my dates are 11/12 and 11/14.

ASSISTANT: May I know your airport codes please?

USER: My source code is SFO an destination code is OAK.

ASSISTANT: Just a second please.

USER: Ok, sure.

ASSISTANT: Your reservation has changed with 1019 flight it belongs to Jet blue airlines.

USER: Thank you for changing my reservation.

ASSISTANT: Thank you for choosing us.