You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Lisa Collins.

ASSISTANT: How may I help you?

USER: Due to some client meeting, I am going to cancel my reservation. Can you please help me in cancelling the reservation?

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal.

USER: Not an issue, anyhow thank you very much for your service.

ASSISTANT: Thank you for reaching us.