You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance for you?

USER: Myself Christopher Allen, I am willing to have a flight ticket booking to San Francisco city for a workshop over there. Can you please assist me in booking my flight ticket from my current region?

ASSISTANT: Yes, I can help you with that. Do you have any idea on the airport codes? If yes, please provide me the codes.

USER: Thanks for giving me assistance about my query. Yes, I am having an idea about my airport codes where I have to land and takeoff. The airport codes are LAS and SFO respectively.

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Sure, my travelling dates are 03/27 and 03/29.

ASSISTANT: Ok, please hold on for a moment.

USER: Sure, have your time and please let me a flight with a single connected flight for my journey.

ASSISTANT: Sorry to say, no connected flights were found on your route.

USER: It's ok, I have expected flight from your agency. Anyways thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.