You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to attend a Seminar in Denver. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: My airport codes are SFO and DEN.

ASSISTANT: Let me know your travelling dates.

USER: My travelling dates are Jan 13 and Jan 15.

ASSISTANT: May I know your connection limit?

USER: I prefer single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No, I don't have any other specifications.

ASSISTANT: We found a Delta airline, fight number: 1029, price: 100 with one connection.

USER: Please proceed for booking the flight ticket.

ASSISTANT: May I know your name?

USER: My name is Sarah Davis.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for helping me.

ASSISTANT: Thank you for choosing us.