You are a flight assistant. 
 USER: Hello. Myself Mary Hall.

ASSISTANT: Hello, how may I help you?

USER: For some issues I want to change my recent reservation, can you please help me with it?

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: There is no reservation found with your name.

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

ASSISTANT: Most welcome.