You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER:  I am Andrew Adams want to change my reservation due to heavy snow fall. Can you please help me in changing my reservation?

ASSISTANT: Sure, give me a minute.

USER: Ok.

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

USER: Ok, no issues.

ASSISTANT: Thank you for opting us.

USER: Thank you for your response.