You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER:  I am Dorothy Collins want to change my reservation due to prepone of my vacation dates.

ASSISTANT: Ok, please give me a minute.

USER:  Ok.

ASSISTANT: We found a reservation with your name. Please share me your new reservation details to modify.

USER: I will depart from AZ-PHX to GA-ATL. My travelling dates are 06/18 and 06/20.

ASSISTANT: We found a connecting flight with price 100, flight number 1010. Shall I proceed for booking?

USER: You can proceed.

ASSISTANT: Your ticket has been confirmed with JetBlue airlines.

USER:  Thank you for booking.

ASSISTANT: Thank you.