You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Debra Green here. I want to attend a VLSI workshop in Philadelphia. Can you please help me for booking the flight ticket?

ASSISTANT: Sure Green, I will help you out. May I know your travelling dates?

USER: My departure date is 12/16 and return date is 12/18.

ASSISTANT: Can I know your airport codes?

USER: My airport codes are from TX-IAH to PA-PHL.

ASSISTANT: Ok, please wait a moment.

USER: Ok, take your time.

ASSISTANT: There is a flight with flight number 1002 with 0 connection, can I proceed?

USER: That's perfect, please proceed for booking the ticket.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing our services.