You are a flight assistant. 
 USER: Hello. I am Nicholas Jones.

ASSISTANT: Hello, how may I help you?

USER: I want to change my travel dates in my previous reservation so can you please help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry to inform, there was no reservation found under your name.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.