You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I suggest you?

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

ASSISTANT: Sure, please provide me your name.

USER: My name is Stephanie Scott.

ASSISTANT: There is no reservation found with your name.

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

ASSISTANT: Have a great day.