You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joshua Anderson.

ASSISTANT: How may I help you out?

USER: I want to travel on the date of 09/15 to attend my grandfather retirement ceremony in PHL. Can you make a reservation for me?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your return date please?

USER: Thank you. my return date is on 09/17 and source code is ATL.

ASSISTANT: There is a flight with connection 1 and price 200, can I proceed?

USER: Yes, you can proceed with the ticket booking.

ASSISTANT: Ok, your ticket has been booked with flight number 1011.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.