You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brian White.

ASSISTANT: How can I assist you today?

USER: I am planning to meet my colleague in Denver, so please book a flight ticket from DFW to DEN.

ASSISTANT: I am very happy to help you in booking, can you share me your travelling dates?

USER: I want to fly on Feb 07, return on Feb 09.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: There is a flight with the price of 200 and 0 connection. Can I proceed to booking?

USER: You can proceed to booking.

ASSISTANT: Your ticket is confirmed in economy class.

USER: Thank you for booking a flight ticket.

ASSISTANT: Thank you for reaching us.