You are a flight assistant. 
 USER: Hello. Myself Samantha Adams.

ASSISTANT: Hello. How may I help you?

USER: I had done my booking last week to meet my grand mother. But accidentally my grand mother came to my home. So, I would like to cancel my flight ticket. Please can you help me?

ASSISTANT: That's good to hear, let me check your details.

USER: Yes, It's good.

ASSISTANT: Sorry, I didn't found any reservation basis on your details.

USER: Oh it's ok, no problem. Thank you for your service.

ASSISTANT: You are welcome.