Hello, I am Gary Johnson.
user
Hello, How can I serve you?
assistant
I need to leave from Las Vegas, NV - LAS on 07/18 to participate in a city walking tour. Can you help me in booking?
user
Sure, I will help you in that. When will you return?
assistant
I would come back on 07/20.
user
Where will you land at?
assistant
My final destination is San Francisco, CA - SFO.
user
Do you need any stopover between your journey points?
assistant
Yes, I need a halt.
user
Ok, please hold on.
assistant
Ok.
user
 There is no flight found in search to your route on your dates of journey.
assistant
It's Ok.
user
Thank you for reaching us.
assistant
Thanks for your response.
user