You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Due to an emergency, I want to change my reservation. Can you help me?

ASSISTANT: Sure, can I know your name please?

USER: Justin Miller here.

ASSISTANT: Sorry Miller, there is no reservation found on your name.

USER: No issue, Thanks for the information.

ASSISTANT: Thank you for approaching us.