You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help that I can do right now to you?

USER: I am trying to cancel my recent ticket because I am unable to travel. Can you please help me?

ASSISTANT: Sure, I will definitely help you.

USER: Thank you.

ASSISTANT: May I your previous booking name to check?

USER: My name is Ronald Allen.

ASSISTANT: There is no reservation found for the user name.

USER: It's ok, that's not a problem. Thank you for helping me.

ASSISTANT: Welcome.