You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I planned to meet my friend in EWR, can you please help me to book a flight ticket from BOS?

ASSISTANT: Sure, can I know the travel dates please?

USER: I prefer to travel on Jul 19 and Jul 21.

ASSISTANT: May I know your name please?

USER: I am Lisa Johnson.

ASSISTANT: Do you have any requirements?

USER: I need a direct flight.

ASSISTANT: Sorry, there are no flights available as per your request.

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

ASSISTANT: Thank you for approaching us.