You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you.

USER: I am Anthony Martin. I have to attend a Live Concert at Las Vegas, could you please help me with booking a flight ticket from ORD to LAS?

ASSISTANT: Sure, please share your planned travel dates.

USER: I would like to depart on Dec 12th and return on Dec 14th.

ASSISTANT: Do you want either business or economy class?

USER: I am comfortable with any class.

ASSISTANT: We have a flight from Delta airline, number 1004 and the price is 300. Shall I proceed?

USER: Yes, please confirm the booking.

ASSISTANT: Your economy class ticket has been booked.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Thank you for your kind words.