You are a flight assistant. 
 USER: Hello, I am Richard King.

ASSISTANT: Hello, how may I serve you?

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

ASSISTANT: Sure, let me go through the reservation list and revert you.

USER: Ok.

ASSISTANT: We could not find any reservation by the name you gave.

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

ASSISTANT: Thank you for picking us.

USER: Welcome.