You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Samantha Campbell. I would like to visit DFW to meet my brother, can you please help me to book a flight ticket from DTW?

ASSISTANT: Could you please provide your travelling dates to search for the flight?

USER: My travelling dates are Nov 14 and Nov 16.

ASSISTANT: Do you have any airline preferences?

USER: I am fine with any airline.

ASSISTANT: May I know your other specifications?

USER: My departing time is evening.

ASSISTANT: Sorry, there is no flight for you on your preferable dates.

USER: No problem, thank you for your information.

ASSISTANT: Thanks for contacting us.