You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for today?

USER: I would like to visit Denver Botanical Gardens with my mother, please book a ticket from DTW to DEN.

ASSISTANT: I am glad to help you about that. Can you please provide your planned dates of journey?

USER: My planned journey dates are 12/20 and 12/22.

ASSISTANT: I will search a flight for your journey, in meanwhile please provide your name for further process.

USER: My name is Nicole Nelson.

ASSISTANT: Thanks for waiting Nelson but sorry to say this there are no flights which can travel on your planned dates of journey.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: You are most welcome, thank you for reaching out here.