You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I would like to travel from DEN to SFO for my business meeting, can you please book my flight ticket?

ASSISTANT: Sure, can you provide your trip dates to reserve your seat?

USER: Thank you. I have to depart on Feb 21st and return back on Feb 23rd.

ASSISTANT: Please mention your name to process further.

USER: My name is Richard Garcia.

ASSISTANT: Do you need any connections between your trip?

USER: Yes, I prefer for a flight with single connection.

ASSISTANT: Do you need economy or business class?

USER: I am comfortable with any class.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: United airlines, flight number:1023 with economy class and price:100. Is that Ok for you?

USER: Yes, you can book the ticket for me.

ASSISTANT: Your ticket has been booked successfully.

USER: Thank you so much.

ASSISTANT: Thank you for contacting us.