You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to change my reservation which is done recently due to some problems, can you please help me?

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

USER: Thank you. Sure, my name is Richard Anderson.

ASSISTANT: Please, standby.

USER: Sure.

ASSISTANT: Thank you for waiting, I did not find any reservation on your name to change.

USER: Ok, not an issue. Thank you for your service.

ASSISTANT: Thank you for approaching us.