You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Ryan Williams.

ASSISTANT: How can I assist you?

USER: I am planning to travel from PHL to DEN, help me in booking a flight?

ASSISTANT: Sure, can I know the travel dates please?

USER: My travelling dates are 09/18 to 09/20.

ASSISTANT: Can I know the connection limit please?

USER: I need 1 connection flight.

ASSISTANT: Do you have any requirements?

USER: I want to depart in evening and I will return In afternoon.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

ASSISTANT: Sorry, there are no flights available as per your request?

USER: That's ok thank you.

ASSISTANT: Thank you for approaching us.