You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I am here to help you with your concern.

USER: Thank you for the response.

ASSISTANT: Can I have your name please to check your reservation status?

USER: My name is Barbara Turner.

ASSISTANT: Please hold on a moment.

USER: Ok, sure.

ASSISTANT: Barbara Turner, no reservation has been found on your name in our database.

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

ASSISTANT: Thank you for approaching us.