You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am George Campbell, can you please help me in booking a flight ticket from JFK to IAD?

ASSISTANT: Sure, I am here to help you with that. Can I have your travel dates please?

USER: My planning dates are from 02/15 till 02/17.

ASSISTANT: Ok, please wait a moment.

USER: Ok, take your time.

ASSISTANT: Sorry George Campbell, no flight is available to you on your planned dates.

USER: It's ok, thank you for checking.

ASSISTANT: My pleasure. Thank you for choosing us, have a great day.