You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I want to change my existing reservation due to change in my schedule. Can you please help me?

ASSISTANT: Sure, please share me your good name.

USER: I am Brandon Hill.

ASSISTANT: Please wait for a while. Sorry to say that, there is no active reservation found on your name.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for reaching us.