You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Due to some financial issues, I would like to change my existing reservation. Please help me out.

ASSISTANT: Sure, may I know your name please?

USER: My name is Brandon Martinez.

ASSISTANT: Just give me a moment.

USER: Sure, take your time.

ASSISTANT: There is no reservation found with your given name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you.