You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am Stephen Adams. Can you please help me in booking my flight ticket from MCO to DEN?

ASSISTANT: Sure, we are here to assist you.

USER: Ok.

ASSISTANT: May I know your travelling dates please?

USER: My travelling dates are May 26 and May 28.

ASSISTANT: Do you have any specifications?

USER: I need business class flight to complete my trip.

ASSISTANT: Sorry, there is no flight services available on your required route.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for contacting us.