You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to amend my recent reservation?

ASSISTANT: Sure, I will help you with that. May I know your name?

USER: Sarah Brown here.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name.

USER: That's fine, anyway thank you for checking.

ASSISTANT: Thank you for reaching us.