You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

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

ASSISTANT: Sure, please provide me the name to check for the status.

USER: Sure, my name is Christopher Allen.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: My pleasure.

ASSISTANT: Sorry to say, there is no active reservation have been found under your name in our database to cancel it.

USER: Ok, that's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.