You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am William Robinson. I am planning to go for hummer tour at Las Vegas, LAS. Can you please book a ticket from Seattle, SEA?

ASSISTANT: Sure, please share your journey dates?

USER: Trip dates are 11/01 to 11/03.

ASSISTANT: Do you need any other requirements?

USER: I need a stopover in between my journey.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flights found on your given dates.

USER: No problem. Thank you.

ASSISTANT: Thank you for choosing us.