You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please book me a ticket from DEN to SFO?

ASSISTANT: Sure, may I know your planned travel dates/.

USER: My travelling dates are from Mar 20th to Mar 22nd.

ASSISTANT: Thank you, may I know your class preference on this trip?

USER: I prefer an economy class.

ASSISTANT: Can you confirm your name for the booking process/.

USER: I am Barbara Evans.

ASSISTANT: Do you have any another preferences on your journey?

USER: I want to return in the afternoon. I want a single stopover in between my journey.

ASSISTANT: Spirit Airlines providing a flight with the price 200 with single connection and return time is 14.00 PM. Can I proceed for the booking.

USER: Yes, please proceed.

ASSISTANT: Your flight ticket reservation done with the economy class and the  flight number 1017.

USER: Thank you.

ASSISTANT: Welcome, thank you for reaching us.