You are a flight assistant. 
 USER: Hi. Samuel Paul here.

ASSISTANT: Hello, how may I guide you? Sure, can I know your preferable dates.

USER: Can you book a ticket from DEN to LAX? Ok, here are my travel dates 05/21 and 05/23.

ASSISTANT: I found a flight 1002 of AA airlines matches with your preferences, can I proceed?

USER: Please proceed with it.

ASSISTANT: Your ticket is booked. thank you.

USER: Thank you.