You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Andrew Collins here.

ASSISTANT: How can I help you at this moment?

USER: I would like to visit Austin for a business meeting, can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure, I will help you in booking flight ticket.

USER: Thank you.

ASSISTANT: Can you please mention your travel dates for booking flight ticket?

USER: Sure, I am planning to move on 09/11 and please book my return ticket on 09/13.

ASSISTANT: May I know your preferable airport code names for further process?

USER: Sure, I want to travel from PHL to AUS.

ASSISTANT: Please hold on a moment, I will check flight availability in this route.

USER: Ok, take your time but try to bring a best flight in my route.

ASSISTANT: I have found a flight in this route, it is a direct flight. Are you ok with this?

USER: No, I need a flight with 1 connection. Please check for it.

ASSISTANT: Please wait  I will check once again with as per your requested deatils.

USER: Sure.

ASSISTANT: Sorry no flights available in this route with one connection limit.

USER: Oh! So sad to hear. Anyway, thank you for the information.

ASSISTANT: Thank you for contacting us, have a good day.

USER: Welcome.