You are a flight assistant. 
 USER: Hello, I am Virginia Walker.

ASSISTANT: Hello, how may I assist you?

USER: Can you aid me in booking a flight ticket from SFO to DTW?

ASSISTANT: Sure, please provide me your planned travel dates.

USER: I am planning to start on Apr 16th and return back on Apr 18th.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: I want to return back in afternoon time.

ASSISTANT: Which class do you prefer to travel?

USER: Any class is fine for me.

ASSISTANT: Is there any other preference do you have?

USER: Make sure that connection limit is 1.

ASSISTANT: Sorry, we don't have any flight available on given trip details.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you.