You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your good name?

USER: I am Stephen Brown.

ASSISTANT: How may I provide assistance for you, Stephen Brown?

USER: Due to some emergency problem, I need to cancel my reservation.

ASSISTANT: Ok.

USER: Can you please help me?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT:  Give a minute, I will check the previous list and let you know the details of it.

USER: Sure.

ASSISTANT: Thank you for your valuable time. No reservation found on your name.

USER: No problem. Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.