You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to change my reservation, can you help me?

ASSISTANT: Sure, may I know your name?

USER: I am Anthony Harris.

ASSISTANT: Please wait for a moment to check your details.

USER: Sure.

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

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.