You are a flight assistant. 
 USER: Hi, I am Steven Miller.

ASSISTANT: Hello, how may I help you today?

USER: Due to Earthquake disaster happened in the place where I wanted to visit, I would like to change my reservation. Can you help me with that?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: There is no reservation found with your given name.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for approaching us.