You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I support you today at this moment?

USER: Please help me to book a flight ticket from IAH to DFW.

ASSISTANT: Sure, I am happy to assist you in booking.

USER: Thank you.

ASSISTANT: Can you please help me with your departure and arrival dates?

USER: My trip dates are from Aug, 15 to Aug, 17.

ASSISTANT: Do you have any break in between your journey?

USER: I prefer a single connecting flight.

ASSISTANT: If you have any other requirements, please let me know.

USER: I need to depart in the afternoon.

ASSISTANT: Please hold on, let me check and revert to you.

USER: Ok.

ASSISTANT: Thanks for waiting. Unfortunately we did not find any flight on your given information.

USER: Thank you for your information.

ASSISTANT: May I know your good name please?

USER: I am Donald Harris.

ASSISTANT: Thank you for reaching us.