You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Robinson.

ASSISTANT: How can I aid you today?

USER: I want to book a flight ticket to Las Vegas, LAS from San Francisco, SFO for Christmas shopping. Can you please help me in that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Could you please help me with your travelling dates?

USER: My travelling dates are from 12/22 to 12/24.

ASSISTANT: What is your price range?

USER: My price limit is 200.

ASSISTANT: There is a Southwest 1009 airline wit fare of 100 which matches your travelling dates. Shall I proceed with booking?

USER: Please proceed for booking.

ASSISTANT: Your booking has been confirmed on name of Katherine Robinson.

USER: Thanks for your help.

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