You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to travel from DEN to MSP. Can you help me to book a flight ticket?

ASSISTANT: Sure, I am willing to help you for this. When are you planning your trip?

USER: I want to fly in the flight on Mar 19 and Mar 21.

ASSISTANT: Do you have any airline preferences?

USER: No, but I want to have a connection of 1.

ASSISTANT: In which class are you willing to travel?

USER: I don't have any.

ASSISTANT: At what time are you planning to depart and return?

USER: I don't have any preference on time.

ASSISTANT: May I know your name please?

USER: I am William Clark.

ASSISTANT: As per your information, there is a flight with American Airlines and the ticket fare is 100. Would you like me to make the booking now?

USER: Proceed to booking.

ASSISTANT: William Clark, your ticket is reserved in economy class with the flight-1003. Your depart time is 6:00 hours and again your arrival time is 22:00 hours.

USER: Thank you for your help.

ASSISTANT: Thank you very much for contacting our agency.