You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sarah Carter.

ASSISTANT: How may I help you at this moment? Nice to meet you Carter.

USER:  I would like to visit an arts expo which is going to be held at Phoenix, PHX. Could you please help me in booking a ticket with fare of 200?

ASSISTANT: Sure Carter, I will help you in booking flight ticket. Can you please mention your preferable travel dates for booking flight ticket?

USER: My travelling dates are 11/20 and return on 11/22.

ASSISTANT: May I know from which city do you want take boarding point?

USER: My source code is Houston,HOU.

ASSISTANT:  Just give me a moment, I will check flight availability in this route as per your requested dates.

USER: Sure.

ASSISTANT: Thanks for your waiting, There is a flight which can travel to your region having a single lay out in between your journey having a ticket fare of 200 which is provided by Frontier airlines. Shall I proceed with this flight?

USER: You can proceed with booking.

ASSISTANT: Have a safe journey Carter, your ticket has been booked with your name Sarah Carter and flight number-1028.

USER: Thank you.

ASSISTANT: Thanks for choosing us.