You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Joshua King here.

ASSISTANT: How can I help you Joshua King?

USER: For my cricket match, I want to visit IAD. Can you book my ticket from ORD?

ASSISTANT: Sure, may I know your journey dates please?

USER: Please make sure this, I want direct flight and my travelling dates are from 07/26 to 07/28.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Sorry, there is no flight available on your preferred dates.

USER: It's ok.

ASSISTANT: Thank you for choosing us.

USER: Thank you.