You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: I am Benjamin Miller. I want to go to business trip, so please help me for booking a flight ticket.

ASSISTANT: Sure, we are here to help you. Please provide your source and destination.

USER: I want to travel from CA-SFO to CO-DEN.

ASSISTANT: Can I know your journey dates?

USER: And my departure day is Oct/05, return day is Oct/07.

ASSISTANT: Please wait a moment. I will revert you.

USER: OK sure.

ASSISTANT: Thanks for your time. We have found a flight with the number 1001, price 100 and with the airline spirit.

USER: OK, you can proceed to booking.

ASSISTANT: your ticket has been confirmed.

USER: Thank you for your service.

ASSISTANT: It's my pleasure to help you. Happy journey.