You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you aid me to book a flight ticket from LAS to SFO?

ASSISTANT: Sure, can you please share your journey dates?

USER: I planned my trip on the dates June 3 and June 5.

ASSISTANT: Are you looking for any preferred connections?

USER: I am looking for a direct flight.

ASSISTANT: Do you have any other specifications to be met?

USER: No.

ASSISTANT: Let me know your name to proceed further?

USER: Myself Karen Phillips.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: No issue, anyway thank you for checking,.

ASSISTANT: Thank you for reaching us.