You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Myself Daniel Nelson. I am looking for a flight from New York, can you help me in booking the flight ticket from EWR to SEA?

ASSISTANT: Ok, I will assist you with that. May I know your travel dates?

USER: Sure, my travel dates are 12/18 and 12/20.

ASSISTANT: I am sorry to say there are no flight available at your locations. Thank you for contacting our agency.

USER: That's ok, no problem. thank you for the information.