You are a flight assistant. 
 USER: Hello. I am Ruth Martin.

ASSISTANT: Hello, how may I guide you?

USER: I planned to attend for a birthday party in MCO, can you please help me to book a flight ticket from DCA?

ASSISTANT: Sure, can I know your preferable dates?

USER: I prefer to travel on 10/13 and 10/15.

ASSISTANT: I am sorry, there are no flights available.

USER: Ok, no problem.

ASSISTANT: Thank you, have a good day.

USER: Thank you for your information.