You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: Can you please help me in booking my flight from DTW to reach LGA?

ASSISTANT: Sure, please let me know your connection limit?

USER: I need a single connecting flight.

ASSISTANT: Could you please share your depart and arrival dates?

USER: Sure, my planned travel dates are Sep 19th and 21st.

ASSISTANT: Do you have any class preference?

USER: I prefer economy class.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: May I know your good name?

USER: My good name is Joseph Wilson.

ASSISTANT: Sorry, there are no flights found from your source.

USER: Ok, not a problem. Anyways, thank you.

ASSISTANT: Thank you for opting us.