You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I am Elizabeth Parker. Can you please help me in booking a flight ticket to DTW from PHL?

ASSISTANT: Sure, May I know the journey dates?

USER: My journey dates are from Jun 07 to Jun 09.

ASSISTANT: Do you have any connection limit?

USER: I am comfortable with any flight.

ASSISTANT: Do you have any preference in return time?

USER: I would like to return in the morning.

ASSISTANT: Is there any other requirements?

USER: I need a economy class ticket.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for opting us.