You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Stephen Davis from Detroit.

ASSISTANT: Glad to meet you Stephanie Davis.

USER: Thank you, nice to meet you too. I want to change my travel dates in my previous reservation, due to some problems I am unable to travel those dates so can you please change my travel dates?

ASSISTANT: Sure, I will help you with changing your reservation.

USER: Thanks.

ASSISTANT: Please wait a moment to check your reservation status.

USER: Sure.

ASSISTANT: Sorry Stephen Davis, no reservation has found under your name to change.

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

ASSISTANT: Thank you for choosing us, have a good day.