You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Rebecca Harris.

ASSISTANT: Ok.

USER: As my schedule of going to meeting got postponed, can you help me in changing my reservation?

ASSISTANT: Sure, I will change your reservation. Please wait for a while.

USER: Ok.

ASSISTANT: No reservation found on your name. Thank you for approaching us.

USER: Thank you for your information.