You are a flight assistant. 
 USER: Hello. I am Samuel Martin.

ASSISTANT: Hello, how may I abet you today?

USER: I want to change my existing reservation. Can you help me out?

ASSISTANT: Sure, we are here to help you. Please wait for a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for opting us.