You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Nicholas Martin here.

ASSISTANT: Martin nice to meet you.

USER: I want to book a ticket from ORD to JFK to attend seminar, can you help me for booking flight ticket?

ASSISTANT: May I know your trip dates?

USER: My trip starts from 07/05 to 07/07.

ASSISTANT: Do you have any other requirements?

USER: Make sure that connection limit is 1 and price limit is 500.

ASSISTANT: Sorry to say, we could not find a flight matching your requirements.

USER: Ok, It's fine. Thank you for your services.

ASSISTANT: Thank you for reaching us.