You are a flight assistant. 
 USER: Hello, I am Barbara Smith.

ASSISTANT: Hello, how can I support you?

USER: I want to change my existing reservation due to my shareholder's has been postponed, so can you help me out with this?

ASSISTANT: Sure, I am happy to help you.

USER: Thank you.

ASSISTANT: Please wait for a while, I will check the status and revert you.

USER: Ok.

ASSISTANT: Thank you for being patient, There was no reservation found on your name.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for reaching us.