You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me to change my reservation to my liking?

ASSISTANT: Sure, can I have your name to check the details?

USER: I am Sharon Anderson.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no active reservations on your given name to change.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching our service.