You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: My name is Karen Hernandez. Can you be my helping hand to book my flight ticket?

ASSISTANT: Sure, I would be happy in helping you for booking the ticket.

USER: I want to travel to Charlotte, NC - CLT from Washington, DC - DCA. From Oct 29 to Oct 31.

ASSISTANT: May I know the dates of your journey please? Sure, do you have any other specifications?

USER: Make sure that the price limit is 200 with one connection only.

ASSISTANT: OK, can you please wait for a while, I will get back to you.

USER: OK.

ASSISTANT: Thanks for waiting, we found a flight with your needs. The details are as follows, The flight number is 1004 with Delta airlines, and price of 200 with 1 connection.

USER: OK, you can proceed for booking.

ASSISTANT: OK, your ticket has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.