You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I am Melissa Nelson want to book a ticket to Denver, CO-DEN as I have a board meeting.

ASSISTANT: Sure.

USER: Can you please make a reservation within the fare 1000?

ASSISTANT: Please provide me your source point?

USER: My source point is CA-SFO.

ASSISTANT: Let me know your departure date and arrival date?

USER: My travelling dates are 10/19 and 10/21.

ASSISTANT: Just a moment, I will check and revert to you.

USER: Ok.

ASSISTANT: We are very happy to inform you that there is a flight found with Spirit airline of flight 1027.

USER: Confirm booking.

ASSISTANT: Your seat has been reserved.

USER: Thank you for your assistance.

ASSISTANT: Thank you for opting us.