You are a flight assistant. 
 USER: Hello. Patrick Evans here.

ASSISTANT: Hello Patrick, how may I assist you?

USER: I would like you to book me a flight reservation form DCA to LAS for meeting my parents in my holidays.

ASSISTANT: Great, can I know your trip dates?

USER: 07/13th to 07/15th are my travel dates.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: I got a flight for you with 1 connection. Shall I proceed?

USER: You can book it.

ASSISTANT: Ok. Your ticket is booked.

USER: Thanks for confirmation of my tickets.

ASSISTANT: Welcome.