You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Linda Edwards here. I want to change my existing reservation, as my exams got postponed. Can you please help me out with it?

ASSISTANT: Sure, I will help you in changing the ticket.

USER: Thank you.

ASSISTANT: Happy to inform you that I have found your reservation.. May I know your travelling dates please?

USER: Ok, thank you. My travel dates are Sep 21st and 23rd.

ASSISTANT: Can I know your airport codes too?

USER: My airport codes are EWR and DCA.

ASSISTANT: Do you need any specifications?

USER: I need a single connecting flight, which departs in the afternoon.

ASSISTANT: Can I know your preferences?

USER: Nothing more to say, please proceed.

ASSISTANT: There is a flight with connection 0 and price 100, can I proceed?

USER: Yes, please proceed.

ASSISTANT: OK, your ticket has been booked with flight number 1006.

USER: Thanks for the help.

ASSISTANT: Thank you for reaching us.