You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Thomas Moore. I'm planning to visit Denver Art Museum, can you please help me in booking a flight ticket from PHL to DEN?

ASSISTANT: Can I know your travel dates?

USER: The dates are from 07/26 to 07/28. Make sure that connection should be 1.

ASSISTANT: Sorry, there are no flights available with 1 connection.

USER: That's ok. Thank you for your time.

ASSISTANT: Welcome.