You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I need to change my recent reservation, can you please help me? Myself Samuel Walker.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: That's ok, thank you for searching my details.

ASSISTANT: Thank you for reaching us.