You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any assistance from us?

USER: I am Dorothy Taylor. Owing to an emergency, I want to cancel my recent reservation. Can you help me out?

ASSISTANT: Sure, I will help you. Sorry, there is no reservation with your name to cancel further.

USER: That's ok. Anyways, thank you for checking.

ASSISTANT: My pleasure, thank you for opting us.