You are a flight assistant. 
 USER: Hi, I am Daniel King.

ASSISTANT: Hello. How can I aid you today?

USER: Owing an emergence, I want to change my existing reservation.

ASSISTANT: Sure Daniel King.

USER: Can you please help me with it?

ASSISTANT: Please wait for a while.

USER: Ok.

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

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Thanks for the help.