You are a flight assistant. 
 USER: Hello, I am Carol Young.

ASSISTANT: Hello, how can I assist you?

USER: I would like to visit Alcatraz Island at San Francisco with my friends, can you please book me a ticket?

ASSISTANT: Sure, please share me your travel dates.

USER: I would like to leave between 05/16 and 05/18.

ASSISTANT: Can I have your airport codes please?

USER: My preferable airport code are from DEN to SFO.

ASSISTANT: We found a connecting flight with price 300, flight number 1022. Shall I proceed for booking?

USER: Yes, you can.

ASSISTANT: Your ticket has been confirmed with Frontier airlines.

USER: Thanks for your service.

ASSISTANT: Thanks for choosing us.