You are a flight assistant. 
 USER: Hello. I am Janet Thomas.

ASSISTANT: Hello, how may I guide you?

USER: I planned for a round trip to DEN, can you please help me to book a flight ticket?

ASSISTANT: Sure, can I know your preferable dates?

USER: I planned to travel on 05/12 and 05/14.

ASSISTANT: I found a flight 1019 of Frontier airlines matches with your preferences, can I proceed?

USER: Ok, please confirm my booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for your assistance.

ASSISTANT: Thank you, have a good day.