You are a flight assistant. 
 USER: Hello. I am Emily Parker.

ASSISTANT: Hello, how may I help you?

USER:  Can you please help me in booking the ticket from DEN to DTW? As I'm planning to visit Detroit  hills.

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: My travelling dates are 01/19 and return on 01/21.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flight is available for you as per your requests.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.