You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need to attend a meeting in Los Angeles, can you please make a reservation from ORD to LAX?

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

USER: My journey dates are on Feb 20th and 22nd.

ASSISTANT: Do you have any other requirements?

USER: I am looking for a flight with single connection.

ASSISTANT: Can I know your name please?

USER: My name is Paul Hill.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: Ok, no problem. Thank you.

ASSISTANT: Most welcome.