You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I address you?

USER: I am Rebecca Nelson. Due to emergency I need to cancel my recent reservation, Can you please help me with that?

ASSISTANT: Sure, let me check the reservation list and revert you.

USER: Sure.

ASSISTANT: Thanks for waiting, we could not find any reservation by the name you provided.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for opting us.