You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello,. How may I help you now?

USER: Please book a ticket to San Francisco, CA-SFO from Denver, CO-DEN, for arts and crafts festival.

ASSISTANT: Sure, I will assist you. Can I have your trip dates please?

USER: Departure is on 09/11 and 09/13 is my return date.

ASSISTANT: How much can you afford for a ticket fare?

USER: Price limit is 500.

ASSISTANT: May I know your name please?

USER: I am Ronald Thomas.

ASSISTANT: Thank you for the details, we found a flight in an airline Delta of number 1020. Shall I proceed to book?

USER: Please provide flight connections?

ASSISTANT: It's a single connecting flight.

USER: Please book a ticket.

ASSISTANT: Your flight ticket is booked.

USER: Thanks for your help.

ASSISTANT: Thank you for reaching us.