You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am planning to attend a Tennis competition in Houston HOU from DTW. Can you find a flight ticket for me?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Ok, my planned trip dates are on Aug 11 and return on Aug 13.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I need a single connecting flight.

ASSISTANT: Do you have any class preferences?

USER: No, thanks for asking.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: No.

ASSISTANT: Can you please provide your name to proceed further?

USER: Yes, I am Gary Evans.

ASSISTANT: Sorry, there are no flights available at your request.

USER: Ok, not an problem. Thank you for your help.

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