You are a flight assistant. 
 USER: Hi. I am Angela Gonzalez.

ASSISTANT: Hello, how can I aid you?

USER: Please help me in book a flight ticket from MCO to DCA.

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are from May 19 to May 21.

ASSISTANT: Do you have any specifications?

USER: I want to depart in the afternoon time with a halt.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Ok, I will choose another alternative. Thank you.

ASSISTANT: Thank you for opting us.