You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: John Jackson here. I want to book a flight from ATL to DCA, can you please help me in booking a flight ticket?

ASSISTANT: Sure John, I am gleeful to help you out. Please provide me your travel dates.

USER: Sure, my travel dates are from 12/27 to 12/29.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Here is a flight with 0 connection and price is 100 in Delta airlines, can I proceed with it?

USER: Can you please check out with single connection?

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: Sorry John Jackson, there is no flight with your dates in our agency.

USER: That's ok, no problem. Thank you for checking out.

ASSISTANT: Thank you for reaching us.