You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Charles Davis.

ASSISTANT: How may I aid you?

USER: Can you please change my reservation, due to change of my trip plan to another location?

ASSISTANT: Sure, please wait. Let me check your reservation status.

USER: Sure.

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

USER: Ok, no issue. Thank you.

ASSISTANT: You are welcome, have a nice day.