You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Brian Adams here. Due to emergency, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure, I am happy to help you. Ok, wait for a minute.

USER: Ok, I will wait.

ASSISTANT: Sorry Adams, there is no reservation found on your name in our database.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for consulting us.