You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Patrick Davis is my name, I am here because for asking a help in changing my recent reservation. Could you please help me with that?

ASSISTANT: Sure, let me check the status and revert you.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found by the name Patrick Davis in our data base.

USER: That's ok, thank you.

ASSISTANT: Thank you for opting us.