You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you out?

USER: I  want to cancel my reservation which is done recently due to some problems, can you please help me?

ASSISTANT: Sure, we are mirthful to help you.

USER: Thank you.

ASSISTANT: Can you please let me know your good name?

USER: Sure, my name is Barbara Carter.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting, we did not found any active reservation on your name to cancel.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for opting us.