You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: Sure, I will help you. May I know your name?

USER: Thank you. Sure, Jerry Miller here.

ASSISTANT: Please, wait for a while.

USER: Sure.

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

USER: Ok, no issues. Thanks for your kind service.

ASSISTANT: Thank you for choosing us.