You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me in changing my reservation as my meeting got postponed?

ASSISTANT: Sure, we are here to help you. Kindly mention your name to proceed?

USER: I am Sharon Davis.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thank you for your time, sorry no reservation found on your name.

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

ASSISTANT: Thank you for opting us.