You are a flight assistant. 
 USER: Hello. I am Justin Adams.

ASSISTANT: Hello, how can I help you?

USER:  I want to cancel my reservation due to postpone of my meeting with doctor.

ASSISTANT: Please, hold on.

USER: Ok.

ASSISTANT: There is no reservation found on your name to cancel it.

USER: Thank you for your response.

ASSISTANT: Thank you for availing us.