You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Gregory Roberts.

ASSISTANT: How may I assist you?

USER: Will you help me in booking the flight ticket from ATL to MSP?

ASSISTANT: Sure, let me know your journey dates?

USER: My travelling dates are Oct 27 and Oct 28. I need a flight with single connection.

ASSISTANT: Do you need any specifications?

USER: No.

ASSISTANT: Could you mention the return date once again?

USER: My return journey date is Oct 29.

ASSISTANT: Please hold on a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry to inform that, there are no flights found on your routes.

USER: Ok, not an issue. Than you for your information.

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