You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I address you?

USER: I am Ronald Young. I need to change my existing reservation, Can you please help me with that?

ASSISTANT: Sure, let me check the reservation list and revert you.

USER: Sure.

ASSISTANT: Luckily we found a reservation on your name. May I know your updated dates to proceed?

USER: I would like to travel on 01/28 to return on 01/30.

ASSISTANT: Can you provide me your airport codes?

USER: My source point is LAX to destination point is DFW.

ASSISTANT: JetBlue airline with flight number 1004 and price of 200 available on your required dates. Shall I proceed?

USER: Ok, proceed for booking.

ASSISTANT: Your reservation has been successfully changed.

USER: Thanks for your information.

ASSISTANT: Thank you for reaching us.