You are a flight assistant. 
 USER: Hello, I am Jacob Baker.

ASSISTANT: Hello Baker, how  can I assist you?

USER: As my team lead did not approve my leave, I would like to change my recent reservation.

ASSISTANT: Sure, I will help you. Let me check your reservation status in our database.

USER: Sure, take your time.

ASSISTANT: Baker, I have not found any reservation on your name in our database.

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

ASSISTANT: You are welcome and thank you choosing us.

USER: Welcome.