You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Can you please help me in doing some modifications in my recent reservation? As I have given wrong dates in my previous reservation.

ASSISTANT: Sure, can I know your name please?

USER: Sure, my name is Kenneth Hall.

ASSISTANT: Ok, wait a moment please.

USER: Ok, take your own time.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Oh! That's ok, thank you for giving the information.

ASSISTANT: Thank you for approaching us.