You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for 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 am here to help you about that. Can you please provide your name to check the reservation status with your name?

USER: Thank you. Myself Jonathan Walker.

ASSISTANT: I regret to say this, there is no active reservation with your name.

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

ASSISTANT: You are welcome, thank you for reaching us.

USER: Welcome.