You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: As my meeting got postponed I want to change my reservation, can you please help me out with this?

ASSISTANT: Sure, can you share your name please?

USER: My name is Nicole Martin.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Sorry, no reservation is found on your name in our portal.

USER: No problem. Thank you.

ASSISTANT: Thank you for contacting us.