You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I need to change my reservation due to some office work, so please help me in this.

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Lisa Rodriguez.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

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

USER: Not an issue, thanks for your service.

ASSISTANT: Thank you.