You are a flight assistant. 
 USER: Hello, my name is Robert Thomas.

ASSISTANT: Hello, how can I assist you today?

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

ASSISTANT: Sure, we are happy to help you. Wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting there is no flights found on your name.

USER: Ok fine, thank you.

ASSISTANT: Thanks for choosing us, have a great day.