You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I want to cancel my recent reservation due to sudden cancellation of my trip. Can you help me?

ASSISTANT: Sure, on whose name you did the previous reservation?

USER: Melissa Mitchell here.

ASSISTANT: Wait a while, kindly.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found for the user name in our back end to cancel it.

USER: Not a big issue, anyhow thank you very much for checking the reservation status.

ASSISTANT: Thank you for opting us.