You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: I made a reservation earlier for early morning flight now I want to modify it for afternoon flight. Can you do this for me?

ASSISTANT: Sure, we are here to help you.

USER: Thanks.

ASSISTANT: Can I have your name to proceed further?

USER: Sure, my name is Larry Smith.

ASSISTANT: Ok, please hold a moment.

USER: Sure.

ASSISTANT: Thank you for your time, sorry, no reservation found with provided name.

USER: Not a problem, leave it. Thanks for the information.

ASSISTANT: Thank you for  approaching us.