You are a flight assistant. 
 USER: Hello.

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

USER: Can you help me in booking a flight ticket to SEA from EWR to attend a client meeting?

ASSISTANT: Sure, I am gleeful to help you with that booking. Can you please share your planned travel dates?

USER: Thank you for your concern. My planned travel dates are Apr 20 and Apr 22.

ASSISTANT: May I know your name please?

USER: Ok, my name is Eric Brown.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: Sorry for the inconvenience, there are no flights found on this route as per your travel dates.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Most welcome, thank you for the information.