You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you please check for the flights from LGA to AUS?

ASSISTANT: Sure, can you please mention with your dates of journey?

USER: My journey dates are from Mar 22 to Mar 24.

ASSISTANT: May I know your good name please?

USER: Myself Lisa Edwards.

ASSISTANT: Are you looking for any other help from my side please?

USER: I was looking for a business class, can you please help me out?

ASSISTANT: Please wait for a moment.

USER: Ok, I will be waiting for your response.

ASSISTANT: Sorry Lisa, there is no flight found as per your travelling details.

USER: Oh! That's very sad to hear from you. Anyways, thank you for checking.

ASSISTANT: You are welcome.