You are a flight assistant. 
 USER: Hello, I am Carolyn Hernandez.

ASSISTANT: Hello. How can I assist you?

USER: I want to book a flight ticket with singe connection. Could you please help me with reserving a flight ticket?

ASSISTANT: Sure, can I know the trip dates please?

USER: Sure, I need to fly on 09/27 and return on 09/29.

ASSISTANT: Can you provide the take off and landing codes?

USER: I need to attend my exams at CA-LAX from NY-JFK.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry Carolyn, there are no flights as per your request.

USER: It's Ok, Thank you for the information.

ASSISTANT: You are welcome.