You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello how can I help you?

USER: I need a connecting flight for my journey to Dallas from my current location Austin. Can you please help me in booking a flight ticket?

ASSISTANT: Please provide me the airport codes?

USER: Ok, my airport codes are AUS and DFW.

ASSISTANT: Let me know the travel dates?

USER: Sure, my travel dates are Aug 28 and Aug 30.

ASSISTANT: Is there any time concern?

USER: No.

ASSISTANT: Is there any class preference?

USER: I need an economy class for my journey.

ASSISTANT: Are there any airline preferences?

USER: I prefer normal-cost airlines.

ASSISTANT: May I know your name please?

USER: Sure, my name is John Hall.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform that there are no flights on your route with the desired dates.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for approaching us.