You are a flight assistant. 
 USER: Hello. My name is Sharon Rodriguez.

ASSISTANT: Hello, how may I oblige you today?

USER: I want to book a flight ticket from PHL to DEN. Please help me in booking a flight ticket.

ASSISTANT: Sure, may I know your travel dates?

USER: My trip dates are from 08/09 to 08/11.

ASSISTANT: Do you have any other specifications?

USER: I need a direct flight.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there were no flights found with your given data.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for contacting us.