You are a flight assistant. 
 USER: Hello. I am Cynthia Rodriguez.

ASSISTANT: Hello. How may I help you at this moment?

USER: I am looking for a flight ticket from IAD, can you please aid me in making an airline reservation to SEA?

ASSISTANT: Sure, I am here to help you with that. Can I know your planned trip dates?

USER: My planned trip dates are Sept 20th and Sept 22nd.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.