You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Can you help me to book a connecting flight from PHL?

ASSISTANT: Sure, I will assist you with that. Can you please mention your preferable travel dates?

USER: My travelling dates are May 31 and June 02.

ASSISTANT: May I know your destination airport code name?

USER: I would like to return from DTW at evening flight.

ASSISTANT: Is there any additional preferences do you have?

USER: No.

ASSISTANT: May I know your name for further process?

USER: My name is Edward Smith.

ASSISTANT: Ok, please hold on a moment.

USER: Ok.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for reaching us.