You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I need your help to book a flight from DCA to DTW.

ASSISTANT: Can I know your journey dates?

USER: Sure, I want to depart on Apr 17 and need to return on Apr 19.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a flight with single connection.

ASSISTANT: Is there any other specifications?

USER: My depart time must be in the evening.

ASSISTANT: May I know your name?

USER: I am Sandra Nelson.

ASSISTANT: United Airlines is providing connecting flight on this route with a ticket fare of 100 and flight departs at 0:00 hours and arrives at 14:00 hours, shall I book your ticket in this flight?

USER: Ok, please proceed.

ASSISTANT: Your ticket is confirmed in flight 1025.

USER: Thank you.

ASSISTANT: Thank you for choosing us.