You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I want to book a ticket from PHL to ORD, can you help me?

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: I am Paul Moore.

ASSISTANT: Please help me with your planned travelling dates.

USER: My trip dates are Apr 21 and 23.

ASSISTANT: Do you need a break in your journey?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any other preferences in your journey?

USER: I want to travel in economy class.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT: Paul Moore, I am really sorry to inform you that there are no flights available for your journey.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us. Have a great time.