You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, May I know, how can I best aid you now?

USER: I am Sarah Turner. Please book me a ticket with the fare of 500 as my business meeting purposes.

ASSISTANT: Sure, can you please share me your journey dates?

USER: I have planned to travel on 01/23 and 01/25.

ASSISTANT: Please specify me your airport abbreviates?

USER: My airport codes are from HOU to ORD.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: There is a flight found in UA airline of flight number 1004 and fare is 200. Shall I proceed for single connecting flight?

USER: Ok, please book this ticket.

ASSISTANT: Sure, your ticket has been booked.

USER: Thank you.

ASSISTANT: Thanks for reaching us, wish you a great journey in UA airline.