You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,. May I know your name?

USER: I am Dorothy Nelson.

ASSISTANT: How can I serve you?

USER: Can please be my helping hand in booking my flight tickets?

ASSISTANT: Sure, I am here to help you, can you provide your journey details.

USER: My departure day is Feb 28 and return day is  March 1.

ASSISTANT: OK, may I know your origin and destination?

USER: My journey place is from CA-SFO to NY-EWR. My price limit is 5000 with connection limit 1.

ASSISTANT: OK, please wait for sometime.

USER: OK,I will be waiting.

ASSISTANT: Thank you, for waiting. Sorry to tell that we were not found flight for your following details.

USER: Thank you for the information.

ASSISTANT: Thank you, for connecting with us. Have a nice day.