You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: My scheduled examination dates has been postponed. So, I would like to change my existing reservation which is under my name. Can you please help me with that?

ASSISTANT: Please tell me your good name.

USER: Sure, I'm Jonathan Moore.

ASSISTANT: Yes Moore, I found a reservation by your name. Please tell me your airport codes.

USER: Sure, my airport codes are from OAK to ORD.

ASSISTANT: Could I know your planned dates of travelling?

USER: My departure date is on 08/06 and return date is on 08/08.

ASSISTANT: Hold on for a second please.

USER: Sure, make sure that the connection limit is 1.

ASSISTANT: Frontier airline is providing a flight for you as per your requirements. Shall I book your ticket?

USER: May I know the price please?

ASSISTANT: Your ticket price is 100.

USER: Ok, please proceed with booking.

ASSISTANT: Your ticket is booked with flight number 1022.

USER: Thank you for your help.

ASSISTANT: Thank you for using our service.

USER: You are welcome.