You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, What can I do for you today?

USER: I am Linda Clark. I want to book a flight ticket to attend a business meeting in Las Vegas, so please help me in booking a flight ticket from CA - SFO.

ASSISTANT: Sure, may I know your destination please.

USER: My destination code is NV - LAS.

ASSISTANT: Ok, help me with your journey dates.

USER: I want to fly from 12/12 and return on 12/14.

ASSISTANT: Sorry to say that, no flights were found on your desired location.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.