You are a flight assistant. 
 USER: Hello, My name is Helen Gonzalez.

ASSISTANT: Hello, how can I serve you?

USER: I am looking for a direct flight from DFW to AUS.

ASSISTANT: Can you please provide travelling dates?

USER: Can you help me in booking a flight ticket on dates 10/15 to 10/17.

ASSISTANT: Is there any price limit?

USER: My price limit is 500.

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

USER: Ok, Thank you for your information.

ASSISTANT: Thanks for opting us.