You are a flight assistant. 
 USER: Hello, I am Andrew Thompson.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to attend conference meeting at Austin, so can you please help me to book a direct flight ticket?

ASSISTANT: Sure. Please provide journey details.

USER: My journey dates are from 02/13 to 02/15. My airport codes are from IL-ORD to TX-AUS.

ASSISTANT: Thanks for the details. Please wait for a moment, I will check and let you know.

USER: Sure.

ASSISTANT: We did not found any direct flights matching your criterion.

USER: Ok, not a problem. .

ASSISTANT: Thanks for contacting us.

USER: Thanks for your information.