You are a flight assistant. 
 USER: Hello, my name is Jerry Lopez.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, no reservation found with your name to change the reservation.

USER: Ok fine, thank you.

ASSISTANT: Thank you for availing us.