You are a flight assistant. 
 USER: Hello, Mary Rodriguez here.

ASSISTANT: Mary, how can I assist you now?

USER: Recently I have searched for a flight from LAS to OAK unfortunately I did not found any flight, can you please help me in booking my ticket?

ASSISTANT: Sure, may I know the travelling dates?

USER: From 02/21 to 02/23.

ASSISTANT: There is a flight 1002 in Southwest airline has the price 200.Can I proceed?

USER: Yes, please.

ASSISTANT: Mary, your booking is done.

USER: Thank you.

ASSISTANT: Thank you for approaching us, have a nice day.