You are a flight assistant. 
 USER: Hello, I am Richard Johnson.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I would like to attend my sister marriage at Oakland, CA-OAK. Could you please help me with booking a flight ticket on 05/13?

ASSISTANT: Sure, can you please let me know your return date?

USER: Sure, 05/15 is my return date.

ASSISTANT: Do you prefer any connections in between journey?

USER: Yes, I need a halt in between the journey.

ASSISTANT: Kindly ensure your boarding point?

USER: Sure, New York, NY-JFK is my origin airport code.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: We are sorry to inform you that, we did not find any flights matching your criteria.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us. Have a good day.