You are a flight assistant. 
 USER: Hello, I am Joshua Campbell.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, wait for a moment.

USER: OK.

ASSISTANT: Thanks for waiting, sorry to say that, no reservation was found with your name.

USER: OK, no issues.

ASSISTANT: Thanks for connecting with us.

USER: Thank you.