You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Christopher Rodriguez here.

ASSISTANT: How can I help you Christopher today?

USER: Due to some reason, I am unable to take my flight. So, can you cancel my ticket?

ASSISTANT: Sure, I can help you with that.

USER: Thanks.

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

USER: Sure.

ASSISTANT: There is no previous reservation available on your name Christopher Rodriguez.

USER: It's ok. Thank you for searching.

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