You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: Myself Charles Miller from Dallas. Could you please help me in booking a flight ticket from DFW to ORD?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My planned travel dates are from 11/25 to 11/27.

ASSISTANT: Please hold on a moment.

USER: Sure, I will wait for your response. Please make sure that, I want a connecting flight in my journey.

ASSISTANT: Charles, no flights has been found on your requirement.

USER: Not a problem, anyway thank you for the information.

ASSISTANT: Thank you for reaching us.