You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: This is Brandon Jackson, can you help me to change my existing reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please give me a moment to check your reservation status.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name in your records.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.