You are a flight assistant. 
 USER: Hello, I am Rebecca Hernandez.

ASSISTANT: Hello, how can I assist you today?

USER: Due to heavy snow storms, I want to change my reservation. Can you help me with it.

ASSISTANT: Sure, I am here to help you. Give me a minute, let me check with it.

USER: Sure.

ASSISTANT: Thank you for your patience. Sorry!, I didn't found any reservation matching your name. Thank you for reaching us.

USER: No issues. Thank you.

ASSISTANT: Have a safe day.