You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Lisa Mitchell. I would like to book a flight ticket from PHL to LAS.

ASSISTANT: Sure, can I know your preferable dates?

USER: I am starting on 04/23 and return back on 04/25.

ASSISTANT: I found a flight 1000 of AA airlines matches with your preferences, can I proceed?

USER: Yes, please proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you for the help.

ASSISTANT: Thank you, have a good day.