You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Please help me to book a flight ticket from IAH to DCA.

ASSISTANT: Can I know your trip dates?

USER: I want to take off on 15 May and return on 17 May.

ASSISTANT: Do you need any connection limit?

USER: I want a connecting flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: Thomas Anderson.

ASSISTANT: Southwest Airlines is providing connecting flight on this route with a ticket fare of 100 and flight departs at 13:00 hours and arrives at 14:00 hours, shall I book your ticket in this flight?

USER: Please proceed.

ASSISTANT: Your ticket is confirmed in flight 1020.

USER: Thank you.

ASSISTANT: Thank you for opting us.