You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to watch sports live events in Houston, so please book a flight ticket from DTW to IAH.

ASSISTANT: Your travelling dates please?

USER: I want to fly on May 03, return on May 05.

ASSISTANT: May I know your connection limit please?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I want business class flight ticket.

ASSISTANT: May I know your name?

USER: My name is Joseph Hill.

ASSISTANT: I am sorry no flights found on your route.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.