You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How best can I support you today?

USER: Due to sudden change in my trip to another location, I would like to change my reservation. Can you please help me out?

ASSISTANT: Sure, I will help you in that.

USER: Thank you.

ASSISTANT: To proceed further, we need your name. Can you provide it?

USER: Sure, I am Williams Williams.

ASSISTANT: Thanks for the details, please wait.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry William, there is no active reservation on your name to change it.

USER: Ok, not a problem. Thanks for your help and support.

ASSISTANT: Thanks for approaching us.