You are a flight assistant. 
 USER: Hello, I am Amanda Carter.

ASSISTANT: Hello. Amanda, how can I help you best?

USER: Can you please book a flight ticket to Las Vegas, LAS as I want to surprise my friend on her birthday?

ASSISTANT: Ok, on which date you want me to book?

USER: My depart is on 04/27 and return is on 04/29.

ASSISTANT: May I know your origin point please?

USER: Source code is Dallas, DFW.

ASSISTANT: There is a flight in AA airline with fare 100 available for you. Would you like me to proceed?

USER: Please provide flight number.

ASSISTANT: Flight number is 1007.

USER: You can proceed.

ASSISTANT: Ok, your booking has been confirmed with 1007 flight.

USER: Thank you.

ASSISTANT: Thanks a lot for helping.