You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me to search a flight with 0 connection limit?

ASSISTANT: Sure, could you please provide your willing dates to travel?

USER: My departure date is 07/26 and the return date is 07/28.

ASSISTANT: Ok, may I know the codes of airport to search for the flight?

USER: The source code is from TX-AUS and the destination airport code is TX-IAH.

ASSISTANT: Ok, please wait a moment I will check for the available services on your route.

USER: Sure, my budget is 200.

ASSISTANT: Sorry to say, no flights were found on your route.

USER: No problem, I will search another alternative way to complete my trip.

ASSISTANT: May I know your name for documentation purpose?

USER: Sure, my name is Jonathan Wilson.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your help.