You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Sandra Allen.

ASSISTANT: How can I amend you today?

USER: Owning am emergency, I want to cancel my reservation, can you help me with it?

ASSISTANT: Sure, we are here to aid you. Please, wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name in our database.

USER: Its ok, thank you for your help.

ASSISTANT: Thank you for availing us, have a nice day.