You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I'm Lisa Hall. I am planning to travel from PHL to ATL to attend my sister's wedding anniversary, can you please help me with booking a flight ticket?

ASSISTANT: Sure,help me with the dates.

USER: Sure, I would like to take off on 01/19 and return back on 01/21.

ASSISTANT: There is a flight with number 1002 and fare is 100. Can I book it?

USER: Yes, please proceed with booking.

ASSISTANT: Your ticket is booked in airline Southwest.

USER: Thank you for your help.

ASSISTANT: Happy journey.