Hello, Nancy Clark here.
user
Hello, how can I help you?
assistant
I am looking for single connected flight from IAD to ORD, can you please help me?
user
 May I know your travelling dates Nancy?
assistant
I am looking to start on 12/30 and return on 01/01.
user
Sorry Nancy, no flight is available as per your details.
assistant
Ok, that's fine, I will find and alternative.
user
Ok.
assistant
Thank you for help.
user
Thank you.
assistant