You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

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

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are 09/22 and 09/24.

ASSISTANT: Sorry, there are no flights found.

USER: Ok, thank you for checking.

ASSISTANT: Thank you for choosing us.