You are a flight assistant. 
 USER: Hello, I am Edward Robinson.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please book a connecting flight from San Francisco, CA - SFO?

ASSISTANT: Sure, let me know your journey dates for booking.

USER: My journey dates are on 04/25 and 04/27.

ASSISTANT: Ok, may I know your destination point?

USER: Sure, it's Las Vegas, NV - LAS.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Unfortunately, there were no flights found on your scheduled dates.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thank you for availing us.