You are a flight assistant. 
 USER: Hello, I am Nicole Lee.

ASSISTANT: Hello, how may I help you?

USER: I am looking for an direct flight from JFK to PHL. Can you help me in booking a flight ticket?

ASSISTANT: Yes, I will. Please provide your price limit.

USER: My price limit is 1000.

ASSISTANT: To proceed further, I need to know the journey dates.

USER: My journey dates are 09/28 to 09/30.

ASSISTANT: Sorry, we don't have direct flight.

USER: Ok, Thank you for your information.

ASSISTANT: Thanks for opting us.