You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Ronald Hernandez here, I want to change my existing reservation due to heavy rain fall in JFK.

ASSISTANT: Sure, let me check for the details.

USER: Sure.

ASSISTANT: I appreciate your patience. Ronald, I have checked and see that there is no reservation found under your name.

USER: Thanks for your information. It's ok.

ASSISTANT: Would you like to book a new flight ticket for you?

USER: No.

ASSISTANT: Ok. Thank you for contacting us.