You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Anna Davis.

ASSISTANT: How can I assist you today?

USER: I am looking for a flight from DTW to DEN, can you help me out?

ASSISTANT: Sure, I am ready to help you with that booking. May I know your travelling dates?

USER: My trip dates are from 12/23 till 12/25.

ASSISTANT: Just give a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available on your desired route.

USER: That's ok, not an issue. Thank you.

ASSISTANT: Thank you for contacting us.