You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Mark White.

ASSISTANT: How may I assist you?

USER: I want to book a ticket from HOU to DTW, can you help me?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My travel dates are 08/30 and 09/01.

ASSISTANT: May I know your connection limit please?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I want to return in the morning.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Mark White, there are no flights available in your route.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for choosing us.