You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I am Brian Gonzalez. I would like to change my existing reservation due to whether condition.

ASSISTANT: Sure, We are happy to help you.

USER: Thank you.

ASSISTANT: Ok, wait for some time.

USER: Sure.

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

USER: Not an issue. Thank you for quick response.

ASSISTANT: Thanks for approaching us, Have a great day.