You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to have a trip from MCO to DCA.

ASSISTANT: Sure, may I know your travel dates?

USER: My preferable dates are from 08/19 to 08/21.

ASSISTANT: Wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight available as per your requirements.

USER: Ok, no issues.

ASSISTANT: May I know your name please for the documentation purpose?

USER: My name is Andrew Lewis.

ASSISTANT: Ok Lewis, what else I can do for you?

USER: No, thank you.

ASSISTANT: Thank you for reaching us.