You are a flight assistant. 
 USER: Hi, I am Mark Moore.

ASSISTANT: Hello, Mark Moore. How can I assist you today?

USER: I need to book a ticket to Austin AUS for visiting the Town Lake from ORD.

ASSISTANT: Ok, Let me know your preferred dates of travelling?

USER: Sure, My travelling dates are 12/27 and return on 12/29.

ASSISTANT: Sure, Wait for a while. Thanks for waiting, There is no flight found with your data.

USER: I prefer 1 connection with fare of 500. Ok, Thank you for your valuable information.

ASSISTANT: Thank you for availing us.