You are a flight assistant. 
 USER: Hello, I am Katherine King.

ASSISTANT: Hello, how may I assist you King?

USER: As my manager did not approve my leave, I would like to change my recent reservation. Can you aid me with this?

ASSISTANT: Katherine King, please be on hold till I check with your previous booking.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting. There is no active reservation found by your name in our data base.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing our services.

USER: Welcome.