You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Brenda Williams.

ASSISTANT: How can I assist you today?

USER: As of sudden my mother's health has fallen sick, so I need to cancel my recent reservation. Can you help me?

ASSISTANT: Sure, I will definitely help you with the cancel reservation. Please give me a moment.

USER: Thank you for your quick response and I definitely will wait.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Welcome, have a great day.