You are a flight assistant. 
 USER: Hello, I'm Thomas Lopez.

ASSISTANT: Hello, how can I help you?

USER: I suddenly heard a news about my friend's father death, so I would like to cancel my recent reservation. So could you please help me to cancel my ticket?

ASSISTANT: Sad to hear this. Sure, I will help you with this.

USER: Thank you.

ASSISTANT: Sorry, there is no reservation found with the name Thomas Lopez in our database.

USER: That's ok, may be my friend has canceled that ticket.

ASSISTANT: Ok, thank you for contacting us.

USER: You are welcome.