You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Ok, may I know your name to check with reservation?

USER: Myself Kenneth Smith.

ASSISTANT: Give me a moment to check please.

USER: Ok.

ASSISTANT: Kenneth Smith, there is no reservation by your name. Thank you for choosing our agency.

USER: That's ok, thank you for the information.

ASSISTANT: Have a nice day.