You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Sandra Edwards. I want to attend a business meeting with my clients at Denver, CO - DEN. Can you please help me with book a single connection of flight?

ASSISTANT: Sure, may I know your journey dates?

USER: My journey dates are 11/26 to 11/28.

ASSISTANT: May I know your source point?

USER: My source point is from Washington DC - IAD.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.