You are a flight assistant. 
 ASSISTANT: Hello, how may I serve you?

USER: Hello, I am Margaret White. I got an invitation to attend Film fare awards, so I need to book a ticket to Washington, DC-DCA on 10/22, can you help me with it?

ASSISTANT: Yes, I will.  Please provide your other details.

USER: My origin is from Washington, DC-IAD and return on 10/24.

ASSISTANT: Sorry, there is no flight available on your name. Thanks for connecting with us.

USER: Ok, no issues. Thank you.