You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you with today?

USER: My name is Karen Hill , due to an emergency I would like to cancelling the reservation, could you help me out?

ASSISTANT: Sure, I can help you with that.

USER: OK.

ASSISTANT: Please allow me a moment to check the details for you. Karen, I have checked and see that there is no reservation found under your name.

USER: That's OK, Thank you for your time.

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