You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Andrew Campbell here.

ASSISTANT: How can I assist you today? Nice to meet you Andrew.

USER: I want to cancel my recent reservation due to my sudden promotion, will you help me over that?

ASSISTANT: Sure, I will help you with that. Please give me a moment.

USER: Ok.

ASSISTANT: Sorry Andrew, there is no reservation has found under your name.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.

ASSISTANT: You are welcome. Please visit again.