You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you now?

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

ASSISTANT: Sure, could I have your name to check your existing reservation?

USER: My name is Paul Mitchell.

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

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for opting us.