You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am planning to visit Museum of Art at Philadelphia, could you please help me with booking a flight ticket from LAS to PHL?

ASSISTANT: Sure, I am here to help you. May I know your travelling dates, please?

USER: I would like to depart on Dec 19th and return on Dec 21st.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: May I know your other specifications?

USER: Make sure that my return time must be afternoon.

ASSISTANT: Can you please provide me your name to proceed further?

USER: I am Melissa Hall.

ASSISTANT: Delta airlines is providing you the connecting flight in economy class, shall I reserve it?

USER: Yes, please confirm the booking.

ASSISTANT: Your ticket has been reserved with flight 1001.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Thank you for choosing us, have a safe trip.