You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: My name is Elizabeth Harris. I want to book a flight ticket from CA-SFO to FL-MCO for attending a meeting.

ASSISTANT: May I know your journey dates?

USER: I will start on 03/23, return on 03/25.

ASSISTANT: Thank you for providing details. wait a moment.

USER: Ok.

ASSISTANT: Sorry to say that no flight is found with your given details.

USER: Thanks for your service.

ASSISTANT: Thank you, for choosing us.