You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am trying to change my recent reservation because the planned trip got cancelled suddenly due to some financial issues in the family. Can you please help me in changing  the ticket?

ASSISTANT: Sure, can you mention your name, so I can check in our data base.

USER: Yes, I am Ryan David.

ASSISTANT: Please hold a moment.

USER: Sure.

ASSISTANT: Sorry there are no active reservations to cancel the ticket on your name.

USER: Ok, not a problem. Thank you for your information.

ASSISTANT: Thank you for reaching our service.