You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you change my recent reservation?

ASSISTANT: Sure, I am here to help you. May I know your name to proceed further?

USER: Ok, my name is Mary Williams.

ASSISTANT: Ok, please wait.

USER: Sure, take your time.

ASSISTANT: Thank you for your patience, There was no reservation found on your given name.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.