You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I be of your service?

USER: I have scheduled to attend several meetings in Atlanta, GA - ATL. Could you please help to book a connecting flight for me?

ASSISTANT: Sure, can you please provide me your dates of travel?

USER: My preferable travel dates are 03/21 and 03/23.

ASSISTANT: Ok, may I know your good name please?

USER: I am Joseph Allen, I want to fly from Washington DC - DCA.

ASSISTANT: Ok. Please wait for a while. I will check and get back to you.

USER: OK.

ASSISTANT: Thanks for your time. There is a UA airline matching your specifications with flight number 1026 and price of 100. Can I proceed for booking with this airline?

USER: Yes, you can proceed now.

ASSISTANT: Ok. Your reservation has been processed.

USER: Thanks for your service.

ASSISTANT: Thank you for reaching us.