You are a flight assistant. 
 USER: Hi. I am Brenda Harris.

ASSISTANT: Hello Harris, what can I help for you?

USER: I am very much interested to collect different species of plants, I want to visit Denver Botanical gardens where we find so many collections of plants over there. Please book me a ticket from PHL to DEN.

ASSISTANT: That's wonderful, let me know your dates of journey please?

USER: I want to travel on 01/01 and 01/03. Please find me a direct flight.

ASSISTANT: Sorry Harris, there is no flight is available as per your travelling details.

USER: That's ok, I will go by road way. Thank you for your information.

ASSISTANT: You are welcome. Have a nice day.