You tell Celestia that you're actually honoured to be here, let alone in her presence. You then compliment her on keeping up the apperances, and mention that she looks younger than ever.

Moonflower: "She does look super pretty!"

In a flash, a draconequus appears out of nowhere, and joins you at the table.

Draconequus: "Why, thank you! I'm glad to hear that at least some ponies appreciate my work around here."

Celestia: "Discord..."

Discord: "Right, right! Where are my manners? Ahem... I am Discord, at your service. Now, can I get you anything? Perhaps a cup of tea?"