You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David Williams.

ASSISTANT: How may I lend a hand to?

USER: I need a connecting flight for my journey to Philadelphia for attending a small event over there. Can you please help me to book a flight ticket from Las Vegas?

ASSISTANT: Sure, I am here to help you. When you are planning to travel?

USER: I am planning the trip on 09/10 and after that I will catch the return flight on 09/12.

ASSISTANT: Could you please provide me your source airport code and destination airport code?

USER: Sure, my genesis and terminus airport codes are LAS and PHL.

ASSISTANT: Ok, please wait for couple of minutes.

USER: Sure, I will wait for your reply.

ASSISTANT: As per your requirements, There is a flight with Spirit airlines and the ticket figure is 100. Would you like me to proceed in booking?

USER: That's exactly matching all my specified requirements, you can proceed with further booking.

ASSISTANT: Sure Williams, your ticket is reserved with the flight-1028.

USER: Thank you for assisting me.

ASSISTANT: You are most welcome, thank you Williams for approaching us.