You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: Can you aid me to book a flight ticket from BOS to EWR?

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My trip dates are Dec 6 and Dec 8 respectively.

ASSISTANT: Do you have any preferences?

USER: I want a direct flight.

ASSISTANT: On what name, do I need to reserve the ticket?

USER: Kathleen Young here.

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

USER: Thank you.

ASSISTANT: Thank you for opting us.