You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me to change my reservation?

ASSISTANT: Sure, let me know your name to check further?

USER: I am Richard Anderson.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT:  Sorry, no reservation found on your given name in our database to change it.

USER: No issues, thank you for checking.

ASSISTANT: Thank you for contacting us.