You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I need to book a ticket from ORD to BOS. Could you book a ticket?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Travelling dates are from Dec, 23 to Dec, 25.

ASSISTANT: Do you have any other specifications?

USER: I would prefer direct flight.

ASSISTANT: Please help me with your name for booking.

USER: I am Raymond Thompson.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: Thank you.

ASSISTANT: Most welcome.