You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sandra Walker.

ASSISTANT: How can I help you Sandra?

USER: Can you help me booking flight ticket from DEN to DTW?

ASSISTANT: On which dates do you want to travel?

USER: I would like to start my journey on 08/26 and return on 08/28.

ASSISTANT: Give me a moment.

USER: Provide flight with 0 connection.

ASSISTANT: Sorry, no flight is available.

USER: Oh! It's ok, no problem. Thank you for your services.

ASSISTANT: Thank you for using our services.