You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ronald Lopez.

ASSISTANT: How can I help you?

USER: I have to attend a sports event in Philadelphia, so I need your help for booking a flight ticket from FL-MCO to PA-PHL.

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are 12/20 to 12/22.

ASSISTANT: I am sorry there are no flights with your requirements.

USER: It's ok.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your service.