You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this moment?

USER: I have to cancel my past ticket which is booked in the last week because my trip got cancelled. Can you please help me to cancel the ticket?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you for considering my request.

ASSISTANT: Can I have your name?

USER: My name is Edward Nelson.

ASSISTANT: Ok, please wait for a minute. Sorry to say that, there is no reservation found on your name in our database.

USER: It's ok, thank you for searching my ticket status.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.