You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: Sure, I would like to go on 07/10 and return back on 07/12.

ASSISTANT: Do you require any stopovers in your journey?

USER: Make sure it is a single connecting flight.

ASSISTANT: Is there any other specifications?

USER: Make sure the depart time is in the evening.

ASSISTANT: Please share your name.

USER: Myself Raymond Brown.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: That's ok, thank you for checking.

ASSISTANT: Thanks for reaching us.

USER: Welcome.