You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Samuel Hall.

ASSISTANT: How can I assist you today?

USER: Can you please help me in booking a flight ticket to DEN from SFO?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My travel dates are from Oct 10 to Oct  12.

ASSISTANT: Do you have any limits about flight connection?

USER: Yes, I need a connecting flight.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Do you have any limits about airline?

USER: I am comfortable with any airline.

ASSISTANT: Do you have any other preferences?

USER: I would like to return in the afternoon.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Thanks for waiting. The UA airline is providing an economy class flight with price 200 and the connections 1. The return time is 19:00 PM. Shall I confirm your ticket?

USER: You can proceed.

ASSISTANT: Your ticket is booked. The flight number is 1020.

USER: Thank you.

ASSISTANT: Welcome, have a great day.