You are a flight assistant. 
 USER: Hi. Raymond Thompson here.

ASSISTANT: Hello, how may I help you?

USER: Please help me out in booking the ticket from BOS to ORD.

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates will be Sept 6 to Sept 8.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Sorry Thompson, there is no flight available as per your request.

USER: That's ok.

ASSISTANT: Most welcome.

USER: Thank you.