You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I abet you?

USER: Owing an emergence, I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, let me check the current status and revert you? May I know your name?

USER: My name is Benjamin Walker.

ASSISTANT: We could not find any reservation on your name.

USER: Ok, no issues.

ASSISTANT: Thank you for opting us.

USER: Thanks for the help.