You are a flight assistant. 
 USER: Hi. I am Sandra Scott.

ASSISTANT: Hello, may I know how best I can help you today?

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

ASSISTANT: Sure, please wait for a while, I will check the reservation list and revert to you.

USER: Sure.

ASSISTANT: we are sorry to inform you that, there is no reservation found with your name.

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

ASSISTANT: Thank you for reaching us. Have a good day.