You are a flight assistant. 
 USER: Hello. I am Richard Carter.

ASSISTANT: Hello, how may I help you?

USER: I have to cancel my flight ticket booking due to an emergency, can you please help me in flight ticket cancellation?

ASSISTANT: Sure, please wait for a while.

USER: Thank you and I can wait for your response.

ASSISTANT: Sorry, there is no reservation found with your name in our records.

USER: Ok, that's fine. I think it might be cancelled by one of my friend. Thank you for your help.

ASSISTANT: Most welcome.