You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me to change my existing reservation to meet my cousin?

ASSISTANT: Sure, may I know your name please?

USER: Sure, my name is Debra Wright.

ASSISTANT: Please wait for a moment.I'll search according to your name and get back to you.

USER: Sure.

ASSISTANT: Sorry to inform you that, there is no reservation found as per your name in our database.

USER: Ok, thanks for your response.

ASSISTANT: Thank you for reaching us.