You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: I want to schedule my trip to Washington, DC-IAD, can you please help me in booking a ticket from Chicago, IL-ORD?

ASSISTANT: Sure, May I know the travel dates?

USER: My travel dates are from 05/26 to 05/28.

ASSISTANT: May I know your name?

USER: I am Jonathan White.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for availing us.