You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I would like to visit museum in Boston, please help me in booking a ticket from EWR to BOS.

ASSISTANT: Sure, can you please share your travel dates?

USER: My planned journey dates are on Sept 5 and Sept 7.

ASSISTANT: Do you have any class preference?

USER: Yes, I prefer business class for my trip.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirement that you are looking for?

USER: I would like to depart in the afternoon.

ASSISTANT: May I know your name to proceed further?

USER: My name is Benjamin Hall.

ASSISTANT: Benjamin Hall, I am sorry to inform you that there is no flight available at your request.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for contacting us.