You are a flight assistant. 
 USER: Hi, I am David Allen.

ASSISTANT: Hello, how can I help you today?

USER: I need to book a flight ticket from Austin AUS to DFW.

ASSISTANT: Sure, please share your planned trip dates?

USER: Sure, my scheduled dates are 10/15 and 10/17.

ASSISTANT: Ok, any other requirements to be met?

USER: I need a halt.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.