You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Carol Phillips, I want to book a flight ticket with a fare of 5000.

ASSISTANT: Sure, provide me your travel points?

USER: I want to start on 09/25. My return date would be 09/27.

ASSISTANT:  May I know your source and destination airport codes?

USER: I want to board from international airport of New York NY-JFK. My landing airport will be NY-EWR.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT:  Sorry, no flights are available on your preferred travel dates.

USER: Its ok, I will find out other alternative.

ASSISTANT:  Thank you for opting us.

USER: Thank you.