You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Mary Harris, I want to book a flight from ATL to BOS. Can you help me with booking?

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

USER: I will travel on May 11 and return on May 13.

ASSISTANT: Do you prefer either business or economy class?

USER: I am fine with any class.

ASSISTANT: May I now your connection limit please?

USER: I need a connecting flight.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I need my return flight in afternoon.

ASSISTANT: Wait a moment please, in the mean while you can share your preferences if you have?

USER: Ok, I will wait for your reply.

ASSISTANT: Mary Harris, sorry to inform you that non of the airline is providing a flight on your travel dates and locations to book a ticket.

USER: Ok, thank you for the details.

ASSISTANT: Thank you for choosing us.