You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I need to book a direct flight to Detroit, MI - DTW on 11/15.

ASSISTANT: Sure, I am here to help you out.

USER: Thanks.

ASSISTANT: May I know your travelling airport codes?

USER: CLT is my source code.

ASSISTANT: When do you want to return?

USER: On 11/17 I want to return.

ASSISTANT: Can I know your name?

USER: Lisa Scott is my name.

ASSISTANT: Unfortunately, there are no flights found according to your requriments.

USER: Ok, no problem. Thanks for the response.

ASSISTANT: Thank you for choosing us.