You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I want to change my existing reservation, due to bad weather conditions. Can you please help me to change my reservation?

ASSISTANT: Sure, I am here to help you out with that.

USER: Thank you for the response.

ASSISTANT: May I know your name to check your reservation status?

USER: My name is Charles Wilson.

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

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.