You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER:  I am Gregory Martinez want to cancel my reservation owing an emergency.

ASSISTANT: Sure, may I know your name? Please wait a moment.

USER:  I have already provided. O. Ok.

ASSISTANT: Sorry to say, no reservation found with name.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thanks for reaching us.