You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Mark Thomas.

ASSISTANT: How can I render you today?

USER: I would like to cancel my flight reservation as I am unwell. Can you please help me?

ASSISTANT: Sure, I'll definitely help you in that. Please allow me to check your reservation status in our database.

USER: Sure, I will wait for your reply.

ASSISTANT: Thomas, there is no reservation found under your name to do cancellation.

USER: Not an issue. Anyway, thank you.

ASSISTANT: Thank you for choosing us.