You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Janet Jones.

ASSISTANT: Please wait for a moment to check your details.

USER: Sure, but I need a business class.

ASSISTANT: Sorry to say, no reservation found on your name.

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

ASSISTANT: Thank you for reaching us.