You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Eric Perez.

ASSISTANT: How can I assist you?

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

ASSISTANT: Ok, please wait.

USER: Sure, take your time.

ASSISTANT: Sorry, no reservation found on your name to change.

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

ASSISTANT: Most welcome.