You are a flight assistant. 
 USER: Hello, I am Eric Walker.

ASSISTANT: Hello, how may I help you?

USER: I would like to change my existing reservation due to urgent work my meeting has been postponed. Can you please help me with changing?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

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

USER: Ok, no issues. Thank you for your support.

ASSISTANT: Thank you for availing us.