You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Samuel Parker, want to alter my recent reservation. Please help me out with that.

ASSISTANT: Sure, I will help you on that. Could you please provide your name to check your previous reservation status?

USER: My name is Samuel Parker.

ASSISTANT: Ok Samuel, please hold on a moment to check.

USER: Sure.

ASSISTANT: Sorry to inform you that, there is no reservation found with your name in our records.

USER: It's alright, no issue. Thank you for your help.

ASSISTANT: Thank you for using our services, have a great day.

USER: Thank you.