You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Due to some urgent meeting, I am planning to change my reservation. Can you please help me for this?

ASSISTANT: Sure, may I know your name?

USER: Myself Laura Lee.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Not a big deal, anyhow thank you very much for your kind information.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.