You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I need your help in changing 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 for your response.

ASSISTANT: May I know your name?

USER: Sure, my name is Katherine Collins.

ASSISTANT: Ok, wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: That's ok, no problem.

ASSISTANT: Thanks for approaching us.

USER: Thank you for your information.