You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me to change my recent reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: Nancy Clark here.

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

USER: That's ok, thank you for the information.

ASSISTANT: Thanks for approaching us.