You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How  can I help you?

USER: I made a reservation earlier. But unfortunately, your agent misplaced the travel dates. So I need a few changes for that. Can you change my reservation?

ASSISTANT: Sure, I can do that for you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Sure, Sharon Garcia is my name.

ASSISTANT: Ok, wait a minute please.

USER: Ok, Please make it quick.

ASSISTANT: Sure, thank you for waiting. Sorry to inform we didn't find any reservation on your name.

USER: That's ok, not a problem.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thanks for your instant help.