You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Christine White.

ASSISTANT: 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: Ok, please allow me for a moment to check with your previous booking.

USER: Sure.

ASSISTANT: I am so sorry, there is no reservation found by your name.

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

ASSISTANT: Thank you for reaching our services. have a great day ahead.