You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I planned to meet my friend in DTW, can you please help me to book a flight ticket from PHL?

ASSISTANT: Sure, may I know the travelling dates?

USER: I prefer to travel on Aug 2 and Aug 4.

ASSISTANT: Do you have any connection limit?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: I am Robert Moore.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no flights found with your preferable dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for availing us.