You are a flight assistant. 
 USER: Hello, I am Brandon parker.

ASSISTANT: Hello, how can I help you at this moment?

USER: Ok, please help me to book a ticket to IAD from ATL, can you help?

ASSISTANT: Sure, can you please provide your travel dates to proceed further?

USER: Ok, my travel dates are 11/12 and 11/14.

ASSISTANT: Brandon Parker, there are no flight services available on this route on your provided dates.

USER: Ok, thank you for the information. I will book in next chat connection.

ASSISTANT: Thank you for contacting us.