You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am looking to book a flight ticket from PHL to EWR. Can you help me for that?

ASSISTANT: Sure, can you share your travel dates?

USER: My travelling dates are Sep 01 and Sep 03.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you prefer either connecting or direct flight?

USER: I prefer to book a single connecting flight.

ASSISTANT: Kindly, mention your arrival and depart timings.

USER: I don't have any time limit.

ASSISTANT: Are there any other specifications?

USER: No.

ASSISTANT: Please forward your name.

USER: My name is Lisa Williams.

ASSISTANT: Sorry, there are no flights found on your specified trip dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for availing us.