You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Richard Adams from Philadelphia. I would like to visit Chicago, IL - ORD, can you please help me to book a flight from PA - PHL?

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

USER: Ok, I want to travel on 12/11 and need to return on 12/13.

ASSISTANT: There is a fight with connection 1 and price 100, can I proceed?

USER: Ok, please proceed.

ASSISTANT: Ok, your ticket has been booked with flight number 1009.

USER: Thank you.

ASSISTANT: Thank you for reaching us.