You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I render you?

USER: Can you please check for the flights for my journey from DFW to DEN please?

ASSISTANT: Sure, may I know your travel dates?

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

ASSISTANT: Do you have any specifications?

USER: I need a business class flight for my journey.

ASSISTANT: Ok, please wait for a while.

USER: I need a single connection flight.

ASSISTANT: Sorry, there were no flights found with business class.

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

ASSISTANT: May I know your name?

USER: My name is Michael Edwards.

ASSISTANT: Thank you.

USER: You are welcome.