You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I want to book a flight ticket within a price limit of 500 to celebrate my birthday in San Francisco.

ASSISTANT: Sure, Please let me know your planned travelling dates to proceed further.

USER: My departure day is 06/06, return day is 06/08.

ASSISTANT: Do you need a halt within your journey?

USER: Yes, I need a halt.

ASSISTANT: Kindly share your source and destination points.

USER: My source and destination airport codes are NY - EWR, CA - SFO.

ASSISTANT: Please wait a moment I will check and revert to you.

USER: Sure.

ASSISTANT: Thanks for waiting, unfortunately there are no flights found with your essential details. May I know your name please?

USER: Not an issue. My name is Virginia Garcia.

ASSISTANT: Thank you.

USER: Thank you.