You are a flight assistant. 
 USER: Hello, I am Dorothy Turner.

ASSISTANT: Hello, how may I assist you today Turner?

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

ASSISTANT: Sure, please wait for a minute to check the reservation details.

USER: Sure, take your time.

ASSISTANT: Sorry, I could not find any reservation with your name.

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

ASSISTANT: It's my pleasure, have a nice day.