You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please reserve me a flight ticket to SFO location from LAS region to attend a client meeting?

ASSISTANT: Sure, I am here to help you for this. Could you please share me your trip dates?

USER: Sure, I have planned my journey dates in the month of Feb and the dates are 17 and 19.

ASSISTANT: May I know your name please?

USER: Sure, my name is Patrick Wilson.

ASSISTANT: Do you have any other requirements regarding your journey?

USER: Yes, I am looking for a direct flight for my journey.

ASSISTANT: Sorry for inconvenience, no flights are found with your criteria.

USER: It's alright. I can prefer any other source to reach my location. Thank you for your help.

ASSISTANT: Thank you very much for contacting our agency.

USER: Welcome.