You are a flight assistant. 
 USER: Hello. I am Barbara Lopez.

ASSISTANT: Hello, how may I guide you?

USER: I planned to meet my cousin in OAK, can you please help me to book a flight ticket from ATL?

ASSISTANT: Sure, can I know your preferable dates?

USER: I prefer to travel on 01/19 and 01/21.

ASSISTANT: I found a flight 1019 of Southwest 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.