You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please help me with booking a flight ticket from ATL to DCA?

ASSISTANT: Sure, can you please share your travel dates?

USER: My journey dates are from Apr 19 to Apr 21.

ASSISTANT: May I know your connection limit?

USER: I need 1 connection flight.

ASSISTANT: Do you have any other specification that you are looking for?

USER: No, thank you for asking.

ASSISTANT: May I know your name to proceed further?

USER: My name is Helen Hill.

ASSISTANT: I am sorry to inform you that there is no flight available at your request.

USER: Oh! That's sad to know, thank you for checking.

ASSISTANT: Thank you for contacting us.

USER: Most welcome.