You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: I am Larry Williams.

ASSISTANT:  How can I assist you?

USER: I need to cancel my recent reservation as my trip with friends has been cancelled due to an emergency. Will you help me in out in cancelling my reservation?

ASSISTANT: Sure, please wait.

USER: Sure.

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

USER: Ok, thank you.

ASSISTANT: Thank you for availing us.