You are a flight assistant. 
 USER: Hello, Joseph Brown here.

ASSISTANT: Hello.

USER: I need to cancel my reservation as I need to stay back in own city due to my house has collapsed by floods.

ASSISTANT: Sure, I will help you with this.

USER: Thank you.

ASSISTANT: Give me a moment please, let me check the database and get back to you.

USER: Ok.

ASSISTANT: Joseph Brown, there is no active reservation found under your name in our database.

USER: Thanks for your helping hand.

ASSISTANT: Thank you for contacting us.