You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Myself Mary Gonzalez. I need your help in booking of a flight ticket from PHL to IAH for an important business meeting, can you please help me out with the booking of a flight ticket on those locations?

ASSISTANT: Sure, I can do that for you. Can you please let me know your travel dates?

USER: Thank you for accepting my request, I want to departure on 01/21 and please confirm my return ticket also on 01/23.

ASSISTANT: Ok, please wait. I will check for the available flights.

USER: Ok, take your time and find a best flight for me.

ASSISTANT: There is a flight available with Spirit airlines and the ticket fare is 100 only. Is that ok for you?

USER: Please book this flight ticket for me.

ASSISTANT: Mary, your ticket is confirmed and your flight number is 1009.

USER: Thank you for your help.

ASSISTANT: You are most welcome and thank you for choosing us.