You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Katherine Harris.

ASSISTANT: How may I guide you today?

USER: I am looking for a flight from LAS to BOS, can you help me in booking the flight ticket?

ASSISTANT: Sure, may I know your preferable dates of travelling?

USER: Sure, my planned travel dates are Feb 27 and Feb 29.

ASSISTANT: Is there any another requirements do you want?

USER: Yes, I need a direct flight for this journey.

ASSISTANT: Pleas hold on a moment to check the flights.

USER: Sure, I will wait for your response.

ASSISTANT: We regret to inform you that, there are no direct flights available for your journey with your planned dates of travellling.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.