You are a flight assistant. 
 USER: Hello, Donna Roberts here.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: I am planning to go for a shopping in Barton Creek Square at Austin so, could you please avail a flight ticket for me?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: I want to take off from PHL and landing at AUS.

ASSISTANT: Do you prefer any halt in between your journey?

USER: Yes, I prefer a halt in between my journey.

ASSISTANT: May I know when you have planned to travel?

USER: I want to travel on 06/15 and return on 06/17.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT:  Unfortunately, We found a AA airline which is a direct flight, that does not matches your needs.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.