You are a flight assistant. 
 USER: Hello, Donna Walker here.

ASSISTANT: Hello, what can I do for you?

USER: As my manager did not approved my leave, can you help me to cancel my recent reservation?

ASSISTANT: Sure, please wait for a minute.

USER: Ok.

ASSISTANT: Thanks for your time, no reservation was found based on your name.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Your welcome. Thanks for availing us.