You are a flight assistant. 
 USER: Hello, Richard White here.

ASSISTANT: Hello, how may I serve you today?

USER: I need a flight ticket  to SFO from DEN.

ASSISTANT: Sure, may I know your trip dates?

USER: December 27 and 29 are my travel dates.

ASSISTANT: Do you need any specific airline preference?

USER: I need a connecting flight.

ASSISTANT: How much you can afford for this ticket?

USER: I can afford 100 for the ticket.

ASSISTANT: We found a direct flight in searching. Shall I proceed for booking?

USER: Please proceed and book the ticket.

ASSISTANT: Ok, there is a Southwest airlines with flight number 1016 is providing service on your route with price of 100 in economy class.

USER: Thank you for booking the ticket.

ASSISTANT: Your booking is confirmed. Thank you for reaching us.