You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Benjamin Brown is here. Could you please assist me in booking a flight ticket from IAH to CLT?

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

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

ASSISTANT: May I know your class preference please?

USER: I prefer to go by business class.

ASSISTANT: Do you have any other requirements please?

USER: I need a stopover.

ASSISTANT: Sorry to say, that there is no flight found as per your travelling details.

USER: Ok, thank you.

ASSISTANT: You are welcome.