You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Michael Hernandez.

ASSISTANT: How may I assist you?

USER: I want to change my existing reservation. Can you help me out?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please, standby.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name to proceed for modification.

USER: Ok, not an issue. Thanks for the information.

ASSISTANT: Thank you for approaching us.