You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Paul Harris, planning to visit Las Vegas. Can you please book me the ticket from DCA to LAS?

ASSISTANT: Sure,  I am here to help you out. Please provide me your trip dates.

USER: My planned dates of journey are from 05/26 to 05/28.

ASSISTANT: Here is a direct flight with airfare of 100 in 1029 AA airlines, can I proceed with it?

USER: Please book my ticket with this airlines.

ASSISTANT: Your ticket has been booked.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for reaching us.