You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you help me to cancel the reservation which I had done recently?

ASSISTANT: Sure, may I know the name to check for the status?

USER: Ok, please check for the name Mark Williams.

ASSISTANT: Please be on hold.

USER: Ok, please take your own time.

ASSISTANT: Thank you for waiting. Here, there is no active reservation have been found under your name in our database to cancel it.

USER: Ok, thank you for providing the information. May be my brother had cancelled it for me and did not inform. Thank you for the assistance.

ASSISTANT: Thank you for reaching us.