You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Brandon Edwards. I want to change my existing reservation due to bad weather conditions. Can you please help me with this?

ASSISTANT: Sure, tell me your travel dates please?

USER: Please change my reservation.

ASSISTANT: Sure, I will help you in change of flight reservation. Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. But I am sorry to say that there is no flight reservation on your name to change it.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you.