You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT:  Sure, will you please mention your preferable departure and return dates of travelling?

USER: My travelling dates are Dec 13 and Dec 15.

ASSISTANT: Do you have any requirements?

USER: I need a direct flight.

ASSISTANT: Sorry, there is no direct flight for you on your route.

USER: Ok, fine thank you for checking.

ASSISTANT: Thanks for contacting us.