You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Gary Lee. Can you please help me in booking a flight ticket from LAS to SFO to attend a seasonal festival?

ASSISTANT: I am here to help you, may I know your dates of travel?

USER: My planned journey dates are Nov 10 and Nov 12.

ASSISTANT:  May I know your preferable journey timings?

USER: I need to depart in the afternoon time.

ASSISTANT:  Do you have any class preference?

USER: No, I don't have.

ASSISTANT: Is there any another specifications on your trip, so that I can arrange like that only.

USER: I prefer a stopover in between my journey.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: Ok,no problem. Thank you for your response.

ASSISTANT: Thanks for choosing us.