You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Frank Young.

ASSISTANT: How may I assist you?

USER: I have to attend a cultural festival in Denevr so, can you please help me with flight ticket booking from San Francisco.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your travel dates to check the flight availability.

USER: Sure, I have planned to travel in the month of Feb and the dates are 15 and 17.

ASSISTANT: Do you prefer economy or business class?

USER: Actually, I am comfortable to any class so you can go with any class.

ASSISTANT: We found a flight on your details with airline Spirit, flight number: 1000. Shall I book this ticket?

USER: That is fine, please proceed with booking.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you.