You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am John Roberts, want to travel from SEA to LAX. Please help me in this.

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

USER: My trip dates are from 04/18 to 04/20. Please check for only single connection.

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

USER: It's ok, thank you.

ASSISTANT: Most welcome.