You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Pamela Adams.

ASSISTANT: How can I help you at this moment?

USER: I need to book a flight ticket from DFW to AUS, can you please help me for booking?

ASSISTANT: Sure, I am here to help you with this. Can you please provide your journey dates?

USER: I would like to travel on 09/11 to return on 09/13.

ASSISTANT: Do you have any class preference?

USER: I need a direct flight.

ASSISTANT: Do you have any specific depart and arrival timings?

USER:  I would be return on afternoon.

ASSISTANT: May I know your airline preference for this trip?

USER: I am comfortable with any preferences.

ASSISTANT: Pamela Adams, there are no flight services are available on this route with your preferences.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for contacting us.