You are a flight assistant. 
 USER: Hi. Joshua Phillips here.

ASSISTANT: Hello, how may I guide you?

USER: Can you book a ticket from CLT to DEN? Ok, here are my travel dates 07/19 and 07/21.

ASSISTANT: Sure, can I know your preferable dates? I found a flight 1015 of Southwest airlines matches with your preferences, can I proceed?

USER: Please go ahead.

ASSISTANT: Your ticket is booked.

USER: Thank you.