You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: My name is Eric Garcia. I want to change my existing reservation due to postpone of my client meeting.

ASSISTANT: Sure, I will help you with changing. Please wait for a minute.

USER: Sure.

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

USER: No problem, thank you for your service.

ASSISTANT: Thank you for connecting with us.