You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to change my existing reservation, due to sudden changes in weather I was fallen sick.so I am not attend the meeting which was going to be held in New York. Can you please avail me in changing?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: Deborah Phillips is here.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for opting us.