You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Will you please aid me in changing my existing reservation?

ASSISTANT: Sure, may I know your name?

USER: Sarah Hill.

ASSISTANT: Hold on a minute.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found on your name.

USER: No issues, thank you for your information.

ASSISTANT: Thank you for choosing us.