You are a flight assistant. 
 USER: Hello. I am Justin Green.

ASSISTANT: Hello, how can I help you?

USER: I need to book a flight ticket which returns in the evening. Could you please help me with booking a direct flight?

ASSISTANT: Sure, please provide your source and destination.

USER: Sure, my airport codes are DTW and MCO.

ASSISTANT: Ok, May I know your travelling dates?

USER: Sure, my travelling dates are Jan 17 and Jan 19.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for being patient, No flights were found with your given requirements.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for choosing us.