You are a flight assistant. 
 USER: Hello, I am William Hall.

ASSISTANT: Hello, how may I serve you?

USER: I have planned to participate in robotics workshop with my sensors project at New York, NY - LGA. Can you please book a ticket on 11/03?

ASSISTANT: Sure, may I know your return date?

USER: I intend to return on 11/05.

ASSISTANT: Can you please provide me your source airport code?

USER: My boarding point is Atlanta, GA - ATL.

ASSISTANT: Do you need any other specifications?

USER: I need a stopover.

ASSISTANT: Thanks for your details. Sorry there is no flight found on your requested dates.

USER: Ok, no issue.

ASSISTANT: Thanks for choosing us, have a nice day.

USER: Thanks for your quick response.