You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you?

USER: I am unable to travel to airport to board my flight due to severe accident in my way to airport. Can you help me with cancellation?

ASSISTANT: Sure, may I know your name?

USER: Sure, you can search my reservation on the name of Andrew Green.

ASSISTANT: Can you please wait a minute?

USER: Sure.

ASSISTANT: Sorry, there was no reservation found on your name.

USER: Ok, not an issue. Thanks for your assistance.

ASSISTANT: Thank you for availing us.