You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Sure, can I know your name for checking the reservation status?

USER: Sure, my name is Kevin Collins.

ASSISTANT: Sorry Kevin, there is no reservation available on your name.

USER: That's ok, thank you for the information.

ASSISTANT: You are welcome.