You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. In which way I can aid you today?

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

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your name for checking your previous reservation status?

USER: Sure, my name is Amy Mitchell.

ASSISTANT: Please hold on a moment, I will check your reservation status.

USER: Ok, I will wait.

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

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for reaching us, have a nice day Amy Mitchell.