You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Rebecca King. Owing to an emergency, I want to cancel my recent reservation.

ASSISTANT: Sure, I am here to help you to cancel that reservation, please wait for a minute to check the reservation details.

USER: Ok.

ASSISTANT: Sorry Rebecca King, I could not find any reservation with your name in our database to cancel it.

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

ASSISTANT: Thanks for choosing us, have a great day ahead.