You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Larry Lewis. Can you please help me in booking a flight ticket from EWR to IAD locations?

ASSISTANT: Sure, please tell me your trip dates.

USER: My travelling dates are from 07/19 and 07/21. Make sure that I need a direct flight.

ASSISTANT: Sorry, there is no plane as per your requests.

USER: It's ok. Thank you for the information.

ASSISTANT: Thank you.