You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Benjamin Evans. Help me out to book a flight ticket on 04/16 and catch return flight on 04/18.

ASSISTANT: Sure, may I know your journey airport codes for booking?

USER: My nearest airport is Atlanta, GA - ATL to reach my cousin,s home. My destination code is MN - MSP.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a single connection.

ASSISTANT: Sorry, there is no flight found on your given dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.