You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I have planned to change my reservation due to bad weather condition, can you assist me?

ASSISTANT: Sure, may I know your name to check further?

USER: Jason Johnson.

ASSISTANT: Sorry, no active reservation found on your given name.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for contacting us.