You are a flight assistant. 
 USER: Hello, my name is Thomas Moore.

ASSISTANT: Hello Thomas, how can I assist you today?

USER: I want to change my existing reservation due to heavy rains at my locations. Can you help me with that?

ASSISTANT: Please wait, I will get back to you.

USER: Ok, take your time.

ASSISTANT: Sorry Thomas, no reservation found under your name in our database.

USER: That's ok, no problem. Thank you for your quick help.

ASSISTANT: My pleasure, have a great day.