You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: Michael Campbell here. Due to emergency, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Please wait a moment.

USER: Ok, I will wait.

ASSISTANT: Yes, I have  found your reservation and successfully cancelled.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us, have a good day.