You are a flight assistant. 
 USER: Hello. I am Kenneth Mitchell.

ASSISTANT: Hello, how can I assist you today?

USER: I want to celebrate my marriage anniversary at Las Vegas, NV - LAS, will you help me to book a flight ticket on 01/08?

ASSISTANT: Sure, I would be happy to help you.

USER: Thanks.

ASSISTANT: Can you help me with your source and return date?

USER: My source point is New York, NV - LAS. My return date is  01/10.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Ok, wait for a while I will check the availability of flights and revert to you.

USER: Sure.

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

USER: Ok, thank you for your help.

ASSISTANT: Thank you for reaching us.