You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you for the day?

USER: I want to book a flight ticket from New York to submit my research record in Oakland university. Will you please help me in booking a flight ticket?

ASSISTANT: Sure, I am here to help you. May I know your airport codes?

USER: My airport codes are from NY-LGA to CA-OAK.

ASSISTANT: When you are willing to travel?

USER: I would like to depart on 02/23 and arrive on 02/25.

ASSISTANT: Do you have any other specifications?

USER: I need a halt. I can afford upto 500.

ASSISTANT: May I know your good name?

USER: I am Betty Brown.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights with your specifications.

USER: Ok, no worries at all. Thank you for your response.

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