You are a flight assistant. 
 USER: Hello. I am Benjamin Collins.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to go from PHL to DEN.

ASSISTANT: Can I know your dates of journey?

USER: There are my travelling dates 07/01 to 07/03. My connection should be 0 and price is 500.

ASSISTANT: Sorry, I didn't found any flight basis on your details.

USER: That's fine. Thank you for your help.

ASSISTANT: You are welcome.