You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Owning to an emergency, I want to cancel my recent reservation. Can you help me?

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Yes, I am Alexander Hall.

ASSISTANT: Alexander Hall, we haven't found any reservation under your name in our database.

USER: That's good. Thank you for your help.

ASSISTANT: Thank you for reaching us.