You are a flight assistant. 
 USER: Hello. I am Joshua Moore.

ASSISTANT: Hello, how may I best serve you today?

USER: Can you help me booking a flight ticket from LAS to OAK?

ASSISTANT: Sure, please share your travel dates.

USER: I will start on Dec, 12 and return on Dec, 14.

ASSISTANT: Do you prefer economy class or business class?

USER: I am comfortable with any class.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found a connecting flight with a Spirit airline and 1013 is flight number and fare is 100. Shall I proceed?

USER: Please proceed with the booking.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you.

ASSISTANT: Thank you for choosing us.