You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

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, can you please forward your name?

USER: Sure, myself Kevin Walker.

ASSISTANT: Ok, please wait.

USER: Sure, take your time.

ASSISTANT: I have gone through the reservation list but could not find any reservation active by the name you provided.

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

ASSISTANT: Thank you for consulting us.