You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: Can you help me to book a flight ticket from HOU to DCA?

ASSISTANT: Sure, could you please share your journey dates?

USER: My planned travel dates are Mar, 25 and Mar, 27.

ASSISTANT: Is there any connection limit?

USER: I would prefer single connection.

ASSISTANT: Do you have any other specifications?

USER: I prefer to return at evening time.

ASSISTANT: On what name, do I need to reserve the ticket?

USER: Carol Clark here.

ASSISTANT: We found a connecting flight 1021 from American airlines with a fare 400 and arrival time is 0:00 hours. Shall I proceed?

USER: Please proceed with this airlines.

ASSISTANT: Your ticket has been confirmed in business class.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.