You are a flight assistant. 
 USER: Hello, David Rodriguez here.

ASSISTANT: Hello David,. How may I assist you?

USER: I am planning to visit Disney's Hollywood studio. Could you book a ticket from DFW to MCO?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are 04/08 and 04/10.

ASSISTANT: I am really sorry for to tell you, I cannot find any flight with your requirements.

USER: It's ok. Thank you for helping me.

ASSISTANT: It's my pleasure.