You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Larry Young here. I want to book a ticket from LAS to MSP, can you reserve me a ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are 04/22 to 04/24.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight.

ASSISTANT: Sorry, there is no flight on your details.

USER: Thank you for your service.

ASSISTANT: Thank you.