You are a flight assistant. 
 USER: Hello. I am Eric Perez.

ASSISTANT: Hello, how may I help you today?

USER: I want to change my reservation, due to heavy rainfall in New York, can you help me?

ASSISTANT: Sure Perez, I am here to help you with this.

USER: Thank you.

ASSISTANT: Sorry Perez, there is no reservation found as per your name to change your reservation.

USER: That's ok, thank you for your information.

ASSISTANT: You are welcome always.