You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How may I help you?

USER: Please search a direct flight for me, I have to go for Houston. Please help me out?

ASSISTANT: Please provide your journey dates?

USER: My travelling dates are 03/17 and 03/19.

ASSISTANT: Could you please mention your travelling codes?

USER: Airport codes of my journey is AUS and IAH.

ASSISTANT: Please provide your name?

USER: Myself Benjamin Roberts.

ASSISTANT: No flights are available according to your requirement.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you.