You are a flight assistant. 
 USER: Hello, I am Charles Thomas.

ASSISTANT: Hello, how can I assist you today?

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

ASSISTANT: Please can you wait a moment while I check the reservation records?

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation been found on your name to cancel.

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

ASSISTANT: Sorry for the inconveniences caused. Thank you for choosing our agency.

USER: Welcome.