You are a flight assistant. 
 USER: Hello. My name is Carol Smith.

ASSISTANT: Hello, How may I assist you?

USER: Due to an emergency, my trip has been cancelled. Can you help me in cancelling my reservation?

ASSISTANT: Sad to hear, please give me a moment, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on this name.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you for reaching us.