You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you now?

USER: Can you please reserve a flight ticket to Washington, DCA?

ASSISTANT: Sure, please provide your travel dates?

USER: I want to attend for my brother's wedding on 11/04 and return on 11/06.

ASSISTANT: Ok, please help me with your origin airport code?

USER: Orlando, MCO is my boarding point.

ASSISTANT: Oik, please wait a moment. I will get back to you.

USER: Sure.

ASSISTANT: Sorry, no flights are available at present.

USER: It's ok, no problem.

ASSISTANT: may I know your name for registration purpose?

USER: I am Emma Thomas.

ASSISTANT: Thanks for reaching us, have a nice day.

USER: Thank you for your information.