You are a flight assistant. 
 USER: Hello, I am Nancy Jackson.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a flight ticket to meet my family friend at New York, NY-JFK.Can you please help me?

ASSISTANT: Sure, we are glad to help you. Please, put forward your journey dates.

USER: My journey dates are from 05/05 to 05/07.

ASSISTANT: May I know your source airport code?

USER: My source code is Washington, DC-IAD.

ASSISTANT: Do you have any other preferences?

USER: I need single connection. My price limit is 5000.

ASSISTANT: Ok, give me a minute.

USER: Sure.

ASSISTANT: Thanks for your time. there are no flights available.

USER: That's ok. Thanks for your information.

ASSISTANT: Thanks for availing our service.