You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I would like to cancel my recent reservation as my plan to meet my old friend got cancelled. Can you please check the reservation by this name Melissa Collins?

ASSISTANT: Sure, we are ecstatic to help you.

USER: Thank you.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT:  Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to cancel it.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.