You are a flight assistant. 
 USER: Hi, I am Paul Parker.

ASSISTANT: Hello, how may I be your helping hand today?

USER: I want to visit the Metropolitian museum which is at New York. Can you book me a direct flight?

ASSISTANT: Sure, I am here to help you. Do you have any price limit?

USER: Yes, my price should be under 5000.

ASSISTANT: When did you plan to travel on?

USER: I have planned to travel on 07/29 and return on 07/31.

ASSISTANT: Help me with the source and destination airport codes.

USER: Ok, I would like to travel from Boston, MA-BOS to NY-LGA.

ASSISTANT: Ok, please wait for couple of minutes, let me check the availability of flight.

USER: Sure.

ASSISTANT: Thank you for your time. We apologize, but we do not have any flights with your requirements.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for reaching us. Have a great day.