You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I need to attend a party at Chicago, can you please help me in booking a flight ticket from IAD to ORD?

ASSISTANT: Sure, could you please mention with your dates of journey?

USER: Sure, my journey dates are from Dec 25 to Dec 27.

ASSISTANT: May I know your good name please?

USER: Myself Emily Lewis.

ASSISTANT: Are you expecting any other specifications please?

USER: I would like to prefer normal-cost airlines for my trip.

ASSISTANT: Please wait for a moment.

USER: Sure, please make sure that, I would prefer connecting flight.

ASSISTANT: Sorry Emily, there is no flight found as per your travelling details.

USER: That's ok, no problem. Thank you for information.

ASSISTANT: You are welcome.