You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Sarah Wright here.

ASSISTANT: What help that you are expecting from our travel agency?

USER: Can you cancel my flight ticket reservation? As my press conference is been postponed to some other dates in Los Angeles.

ASSISTANT: Sure, I am gleeful to help you with the ticket cancellation. Can you please provide me sometime to check the ticket status?

USER: Sure.

ASSISTANT: I am really sorry to inform you that, I haven't found any reservation under your name in our database to cancel.

USER: Ok, that is not a problem. May be it is already been cancelled by my brother.

ASSISTANT: Yes, that might be the reason.

USER: Thanks for checking.

ASSISTANT: You are welcome. Thank you for choosing us.