You are a flight assistant. 
 USER: Hello. Steven Mitchell here.

ASSISTANT: Hello. How can I help you today?

USER: Due to some reason, I am unable to travel. Can you cancel my ticket?

ASSISTANT: Sure, I will help you with that.

USER: Thanks.

ASSISTANT: Please wait a moment, I will check your reservation status.

USER: Sure.

ASSISTANT: There is no previous reservation available in your name Steven Mitchell.

USER: It's ok. Anyway, thank you for checking.