You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Could you book my ticket from DEN to SFO?

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are June 15 and June 17.

ASSISTANT: Do you need any connections?

USER: I prefer a connecting flight.

ASSISTANT: Are there any other preferences?

USER: I want to return from SFO in the afternoon.

ASSISTANT: May I know your name?

USER: Dorothy Evans here.

ASSISTANT: Connecting flight number 1002 with price 100 in economy class is available. Is it ok?

USER: Please book my ticket.

ASSISTANT: Your ticket is booked.

USER: Thank you for assisting me.

ASSISTANT: Thank you for reaching us.