You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help yo today?

USER: Stephen Harris here. Please help me out in booking the ticket from MSP to EWR.

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

USER: My trip dates will be Mar 27 to Mar 29.

ASSISTANT: Ok, may I know your airline preference please?

USER: No.

ASSISTANT: May I know your class preference please?

USER: Business class.

ASSISTANT: Please wait for a mean while.

USER: Ok.

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

USER: That's ok, thank you.

ASSISTANT: You are welcome.