You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Myself Margaret Edwards. Owing to an emergency, I want to change my existing reservation. Can you help me in that?

ASSISTANT: Sure, I will help you. Please wait for a moment.

USER: Ok.

ASSISTANT: I have found your reservation. Can I have your new dates of travelling?

USER: My trip dates are Jan 2 to Jan 4.

ASSISTANT: May I know your source and destination airport codes respectively.

USER: My airport codes are DEN to PHX.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight and my depart time should be in morning time.

ASSISTANT: There is a connecting flight available with JetBlue airline, shall I proceed?

USER: You can proceed.

ASSISTANT: Your booking is done with flight number 1008. Your flight departs at 9:00 am.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.