You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you please help me to book a flight from SEA to DEN?

ASSISTANT: Can I have your journey dates?

USER: Sure, I want to travel on May 16 and need to return on May 18.

ASSISTANT: Do you need any connection limit?

USER: I need a flight with single connection.

ASSISTANT: Do you have any other specifications?

USER: I prefer economy class to travel.

ASSISTANT: May I know your name?

USER: I am Lisa Baker.

ASSISTANT: United Airlines is providing connecting flight on this route with a ticket fare of 100 and flight departs at 20:00 hours and arrives at 17:00 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.