You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Edward Evans. I am planning to visit Denver Zoo, could you please help me with booking a flight ticket?

ASSISTANT: May I know your travel codes?

USER: My source airport code is DTW and destination airport code is DEN.

ASSISTANT: Please help me with your travel dates?

USER: I would like to take off on 05/04 and return on 05/06.

ASSISTANT: Sorry, there is no flight found basis on your details.

USER: That's ok, I will find an another alternate way to complete my trip.

ASSISTANT: Thank you for choosing us.

USER: Anyways, thank you for the information.