You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to book the flight ticket from SEA to LAX. Can you please help me?

ASSISTANT: Sure, may I know your trip dates please?

USER: My travel dates are Apr 27 and Apr 29.

ASSISTANT: Do you have any other requirements?

USER: I need a direct flight.

ASSISTANT: Ok, let me know your name please.

USER: Betty Gonzalez.

ASSISTANT: Sorry, there is no flight available as per your request.

USER: Ok, thank you for the information.

ASSISTANT: Most welcome.