You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Myself Patrick Turner. Due to some business meeting, I am willing to change my existing reservation. Can you please help me for this?

ASSISTANT: Sure, give me a minute.

USER: Ok, I will wait for your kind response.

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

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

ASSISTANT: Thank you for availing us.