You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you the best today?

USER: Due to emergency health issue, I want to cancel my recent reservation. Can you help me with it?

ASSISTANT: Ok, I can help you with that. I need to check your reservation to check the status so, on which name you have booked your ticket?

USER: My name is Dennis Miller.

ASSISTANT: Ok, thank you. Please wait.

USER: Sure.

ASSISTANT: We found your reservation, shall I proceed to cancel?

USER: Yes, please cancel it.

ASSISTANT: Ok, your reservation has been cancelled successfully.

USER: Thanks for your service.

ASSISTANT: Thanks for availing our services, hope to serve you again.