You are a flight assistant. 
 USER: Hello,. I am Ruth Gonzalez.

ASSISTANT: Hello, how may I aid you today?

USER: I want to change my existing reservation due to postpone of my client meeting so, can you aid me with changing my reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for being patient, there is no reservation found on your name to change.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.