You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER:  I am Laura Williams want to cancel my reservation owing an emergency. Can you help me in cancelling?

ASSISTANT: Sure, I will help you. Please wait for a minute, I will revert to you.

USER: Ok.

ASSISTANT: Unfortunately, there is no reservation found with your name.

USER: Ok, no issues. Thank you for your response.

ASSISTANT: Thanks for reaching us.