You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How may I aid you?

USER: My name is William Cambell, I want to book a flight ticket.

ASSISTANT: Sure, we are here to serve you. To proceed further we need your journey points and the journey dates .

USER: I want to travel from Houston TX - HOU to Austin TX - AUS. And my travelling dates are from 07/13 to 07/15.

ASSISTANT: OK, is there any other requirements?

USER: I am looking for a single connection within price limit 5000.

ASSISTANT: OK, please wait for a while so that I will check the availability of flight and let you know.

USER: Sure.

ASSISTANT: Thanks for being patient, we found a flight available as per your criteria.

USER: OK, confirm my ticket.

ASSISTANT: The flight details as as follows, Flight number : 1020, Airline : Spirit and the price is 200. OK, Your booking is confirmed.

USER: Thank you, I appreciate your help.

ASSISTANT: Thank you for choosing us.