You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Owing an emergency, I want to cancel my reservation. Can you help me for that?

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: My name is Patricia Walker.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: I found your reservation and I have successfully cancelled it.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.