You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Margaret Perez here. I would like to meet my relatives at New York, please help me in booking a ticket from ATL to EWR.

ASSISTANT: Sure, when you are planning to make your journey?

USER: My planned journey dates are on Dec 15 and Dec 17.

ASSISTANT: Please provide your specifications.

USER: I need a flight with single connection.

ASSISTANT: Unfortunately there are no flights found with your given details.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you.