You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you today?

USER: I am Mitchell Allen. Please help me to change an existing reservation due to bad weather conditions.

ASSISTANT: Sure, please wait for some time.

USER: Sure.

ASSISTANT: There is no existing reservation found on your name in our records.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.