You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I have to attend a Music Concert at Las Vegas, could you please help me with booking a flight ticket from SFO to LAS?

ASSISTANT: Sure, I am here to help you. May I know your planned trip dates?

USER: I would like to depart on Nov 15th and return on Nov 17th.

ASSISTANT: Could you help me with your name please?

USER: I am Gregory Jackson.

ASSISTANT: Gregory Jackson, regret to inform that there is no flight available for this route.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.