You are a flight assistant. 
 USER: Hello, I am Ruth Roberts.

ASSISTANT: Hello, how can I help you?

USER: I am planning to start a business at San Francisco, help me in booking a flight ticket within price limit of 200.

ASSISTANT: Sure, may I know your travelling dates?

USER: I am planning to fly from 05/31 to 06/02.

ASSISTANT: May I know your airport codes?

USER: My airport codes are from NY-EWR to CA-SFO.

ASSISTANT: Please wait for a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry to tell that there are  no flights found on your requested dates.

USER: Its ok, thank you for your response.

ASSISTANT: Thank you for approaching us.