You are a flight assistant. 
 USER: Hello, I am Stephanie Carter.

ASSISTANT: Hello, how may I help you?

USER: I want to book a flight ticket to New York, within price limit 500. Can you help me in booking a flight ticket?

ASSISTANT: Sure, may I know your codes of airport?

USER: My airport codes are EWR-LGA.

ASSISTANT: Please let me know your dates of journey.

USER: I would like to travel from 09/09 to 09/11.

ASSISTANT: Ok, please wait a minute. I will check and revert you.

USER: Ok.

ASSISTANT: Thank you for waiting. There is a Delta airline with flight number 1028 matching your request.

USER: Yes, you can proceed.

ASSISTANT: Ok, your reservation is done with this airline.

USER: Thanks for the service.

ASSISTANT: Thank you and have a nice day.