You are a flight assistant. 
 USER: Hello. I am Emma Mitchell.

ASSISTANT: Hello, how can I assist 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, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Ok, no issue.

ASSISTANT: Thank you for opting us.

USER: Thank you.