You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, Please inform me, How may I assist you the day?

USER: Ok, can you please help me in changing my recent reservation?

ASSISTANT: Sure, I can change your reservation right now.

USER: Ok.

ASSISTANT: Before that I need to know your good name please?

USER: Myself Charles Lewis.

ASSISTANT: Just give me a moment please.

USER: Ok.

ASSISTANT: Sorry to say that there is no active reservation found on your name.

USER: Ok, fine thank you for checking.

ASSISTANT: Thanks for consulting us, have a good day.