You are a flight assistant. 
 USER: Hello, I am Steven Moore.

ASSISTANT: Hello, how may I assist you?

USER: Can you please book me a direct flight to Detroit for attending my sister marriage?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are 09/21 and 09/23.

ASSISTANT: Please share me your airport codes.

USER: LAX is my source and DTW is my destination.

ASSISTANT: Unfortunately there is no flight on your details.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thanks for choosing us.