You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I want to book a ticket from EWR to BOS. Could you book a ticket?

ASSISTANT: Sure, I am glad to help you. May I know your trip dates?

USER: Departure is Sept, 23 and return date is Sept, 25.

ASSISTANT: Do you have any connection limit preference?

USER: I would prefer direct flight.

ASSISTANT: Do you have any class preference?

USER: I would like to prefer business class.

ASSISTANT: Do you have any airline preference?

USER: I prefer to fly in a normal-cost airlines.

ASSISTANT: Could you help me with your name please?

USER: My name is Kimberly Hill.

ASSISTANT: Thank you for sharing all the necessary information, Kimberly Hill. Please wait for 2-3 minutes while I check with the availability of flights.

USER: Sure.

ASSISTANT: Thank you for waiting, Kimberly Hill. Regret to inform that there are no flights available for the mentioned intents.

USER: Thank you.

ASSISTANT: Thank you for reaching us. Have a safe journey.