You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Steven Parker. I would like to book a ticket to Austin, can you please help me out in booking from CLT TO AUS?

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: I am travelling on these dates July 14th and 16th.

ASSISTANT: May I know your class preferences?

USER: I don't have any class preference.

ASSISTANT: Ok, may I know your price limit?

USER: I prefer normal-cost airlines.

ASSISTANT: Sorry, there is no flight running on your route with your preferences.

USER: Ok no problem, thank you for your services.

ASSISTANT: Welcome, have a nice day.