You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide service to you?

USER: Can you please help me in booking a flight ticket to DFW from PHL?

ASSISTANT: Sure, may I know your scheduled travel dates?

USER: My travel dates are from Oct 27 to Oct 29.

ASSISTANT: Can I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I would like depart in the evening and return in the morning. I need a economy class ticket.

ASSISTANT: To proceed further, may I know your name?

USER: I am Dennis Miller.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.