You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you aid me in booking a flight ticket from IAH to PHX?

ASSISTANT: I am glad you have contacted us. I will assist you.

USER: Thank you.

ASSISTANT: Please help me with your preferred class to fly.

USER: I prefer to travel in economy class, so please check accordingly.

ASSISTANT: Sure, I will check for a economy class flight as per your request. Do you need a break in your journey?

USER: Make sure that connection limit is 1.

ASSISTANT: I will check for it. Please help me with your name.

USER: I am Jonathan Taylor. I want to depart from my source in afternoon time.

ASSISTANT: Thank you for the information. Please help me with your planned travelling dates.

USER: I am planning to start on Sep 17th and return back on Sep 19th. All information have been mentioned, please make it quickly.

ASSISTANT: Sure, please allow me a minute of your valuable time.

USER: Take your time.

ASSISTANT: Thank you. Jonathan Taylor, I highly regret to inform you that there are no flights that depart in the afternoon from Houston to Phoenix.

USER: Every time some thing or the other, there is a problem from your agency. Next time I don't prefer your agency.

ASSISTANT: I am really sorry for the inconvenience caused to you.

USER: No need to say sorry, just try to improve your service. Anyways hope for the better service next time.