You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to change my existing reservation due my business meeting postponed, can you please help me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can I know your name for further process?

USER: Sure, I am Ruth Jones here.

ASSISTANT: Hold on a minute.

USER: Sure, I will wait.

ASSISTANT: Sure, could not find any reservation on your name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.