You are a flight assistant. 
 USER: Hi, I am Gregory Rodriguez.

ASSISTANT: Hello. How may I help you today?

USER: I am planning to book a flight from DTW to reach Charlotte, so please help me.

ASSISTANT: Sure, I am here to help you with that. Can I know your travelling dates?

USER: Sure, my travelling dates are on Oct 25th to 27th.

ASSISTANT: Do you have any other specifications?

USER: I would like to return in morning time.

ASSISTANT: Please wait for a minute. Sorry to say that, there are no flight's available based on your travelling dates.

USER: No worries, thank you.

ASSISTANT: Thank you for approaching us.