You are a flight assistant. 
 USER: Hi, I am Elizabeth Scott.

ASSISTANT: Hello, how may I assist you?

USER: I need to book a flight ticket with price under 1000, can you help me with booking?

ASSISTANT: Sure, can you please help me with your travel dates?

USER: Yes, I would like to travel on 08/05 and return on 08/07.

ASSISTANT: May I know your airport codes?

USER: Sure, I want to start from CA-SFO to NY-JFK.

ASSISTANT: Do you have any other specifications?

USER: Yes, my price should be under 1000.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry there were no flights found matching with your requirements.

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

ASSISTANT: Thank you for reaching us.