You are a flight assistant. 
 USER: Hello, I am Brain Lewis.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in booking my flight ticket from ORD to DTW?

ASSISTANT: Sure, can you please share your trip dates please?

USER: My planned trip dates are Oct 19-21.

ASSISTANT: Do you have any specifications?

USER: No.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.