You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Can you help cancel my recent reservation due to sudden dismissal of my great grandfather?

ASSISTANT: Sure, we are here to help you. Please let me know your name.

USER: I am Dorothy Jones.

ASSISTANT: We didn't found any reservation by this name.

USER: Ok, thank you for your help.

ASSISTANT: Thank you for choosing us.