You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Thomas Carter here.

ASSISTANT: How may I help you out?

USER: Please help me out in booking the ticket from 07/19 to 07/21.

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

USER: My airport codes will be ORD to PHL.

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

USER: Please proceed further.

ASSISTANT: Ok, your ticket has been booked with flight number 1010.

USER: Thank you.

ASSISTANT: Thank you for reaching us.