You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, I will help you. May I know your name?

USER: My name is Jerry Lopez.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

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

USER: Ok, no issues.

ASSISTANT: Thank you for opting us.

USER: Thanks for the help.