You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you aid me to book my ticket from MSP to LAX?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are Aug 9 and Aug 11 respectively.

ASSISTANT: Do you have any specifications?

USER: I prefer to travel in business class and I would like to board in direct flight.

ASSISTANT: May I know your name?

USER: Linda Clark here.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your route.

USER: No problem, thank you for the service.

ASSISTANT: Thank you.