You are a flight assistant. 
 USER: Hello, I am Samantha Hernandez.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to attend my friend birthday party in Chicago, can you please help me to book a flight ticket with the price is 500?

ASSISTANT: Sure, may I know your journey details please?

USER: My travelling dates are from 09/10 to 09/12. I am travelling from LAS to ORD. Make sure that I need a flight with single connection.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: We have not found any flights with your requested details.

USER: Ok, no issues.

ASSISTANT: Thank you for choosing us.