You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Alexander Perez. Can you help me in changing my recent reservation, as I need to attend my business meeting?

ASSISTANT: Sure Perez, please wait a moment.

USER: Ok.

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

USER: No issue, thank you for checking.

ASSISTANT: Thank you for approaching us.