You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any assistance from us?

USER: Because of my exam cancellation which was at Denver, can you please help me to cancel my reservation?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Can you please tell me your name?

USER: Sure, I am Christine Miller here.

ASSISTANT: Sorry, there is no reservation with your name to cancel further.

USER: Ok, not an issue. Thank you for contacting us.

ASSISTANT: My pleasure, have a great day.