You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I am Elizabeth Evans. I am planning to go for a Hummer Tour with my colleagues at Las Vegas, NV - LAS, will you he me in booking a flight ticket?

ASSISTANT: Sure. May I know your source code?

USER: My source point is Oakland, CA - OAK.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a single connection.

ASSISTANT: Let me know your journey dates.

USER: My journey dates are 03/24 and 03/26.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Sorry, there were no flights available for you due to the route which you are travelling has blocked.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.