You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Andrew Lewis.

ASSISTANT: How can I aid you today?

USER: I would like to cancel my reservation as I am leaving for delegates meet, can you please help me out?

ASSISTANT:  Sure, definitely I will help you.

USER: Thank you.

ASSISTANT: Sorry to say this, there is no reservation found under your name in our database.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us.