You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Michelle Parker.

ASSISTANT: How may I assist you?

USER: I would like to book a ticket from DFW to HOU, can you please help me out?

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

USER: I am travelling on these dates Nov 26th and 28th.

ASSISTANT: Please share if you want to travel in any specific time?

USER: I prefer return time in the evening.

ASSISTANT: May I know your connection limit please?

USER: I need a single connected flight.

ASSISTANT: Do you prefer either business or economy class?

USER: I prefer business class.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Michelle Parker, there are no flights available in your route.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for choosing us.