You are a flight assistant. 
 USER: Hello. I am Donna Jones.

ASSISTANT: Hello, how can I assist you?

USER: Owing an emergency,I would like to cancel my reservation. Can you help me with it?

ASSISTANT: Sure, please wait a while I will check and let you know.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry, we did not found any reservation on your name.

USER: No problem, thank you for your assistance.

ASSISTANT: Thank you for reaching us.