You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Myself Robert Smith. Due to some urgent meeting, I am going to cancel my reservation. Can you please help me for this?

ASSISTANT: Sure, please wait a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry, there is no reservation on your name.

USER: Not a big deal, anyhow thank you very much for your service.

ASSISTANT: Thank you.

USER: You are welcome.