You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Kevin Thompson. Can you please aid me to find a flight which is having a connection limit 1 from Atlanta to Denver?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Thank you for accepting my request. My travel dates are Feb 19th and Feb 21st.

ASSISTANT: Do you need any specifications?

USER: I need a flight which is returning in the afternoon time.

ASSISTANT: Can I know your airport codes too?

USER: The source and destination airport codes are ATL and DEN.

ASSISTANT: Sorry, there are no flights found.

USER: It's ok, not a problem. Thank you for your help.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.