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

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, I will help you with that. Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, no active reservation was found on your name in the database.

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

ASSISTANT: Thank you for opting us.

USER: Welcome.