You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: I am Justin Anderson here, I want to reserve my ticket within the travelling dates of 01/19 to 01/21?

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

USER: Thank you.

ASSISTANT: May I know your airport codes too?

USER: Sure, my preferable airports codes are from DCA to ATL.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait.

ASSISTANT: There is a flight with connection 1 and flight number 1009 and price 100, can I proceed with this flight?

USER: Please go ahead with this ticket booking.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your help in booking my ticket.

ASSISTANT: Thank you for choosing us.