You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I would like to change my reservation which is under my name. Can you please help me with that?

ASSISTANT: Sure, I am here to help you with your concern.

USER: Thank you.

ASSISTANT: May I know your name please to check your reservation status?

USER: My name is Helen Lewis.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: Helen Lewis, no reservation has been found on your name in our database.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.