You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you for the day?

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

ASSISTANT: Sure. Can I have your name to track your details?

USER: My name is Dorothy Perez.

ASSISTANT: Ok, please wait Dorothy Perez.

USER: Ok.

ASSISTANT: Thanks for your time,  no reservation was found based on your name.

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

ASSISTANT: Thank you for availing us.