You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I want to book a flight ticket from PHL to MSP. Could you help me in booking?

ASSISTANT: Sure, I am glad to help you in booking. Can you please share your travel dates?

USER: My travelling dates are from June 15-17.

ASSISTANT: Do you have any specifications?

USER: I need direct flight.

ASSISTANT: Sorry, no direct flights are available on your preferable travel dates.

USER: That's ok, no problem.

ASSISTANT: May I know your name?

USER: Thank you. George Lewis here.

ASSISTANT: Thank you for reaching us, have a nice day.