In the very first part of the novel the register of language is highly formal. The reader can understand this watching to the terms "Sir" and "may" that create distance from the characters. 

After this, with the sentence "I see I allarmed you" the reader understands that the interlocutor is frightened. There's a frequent use of the subject "I" to focus the reader's attention on the narrator of the story.

"Don't be afraid by my bear" is a meaningful expression that gains power from the allitteration of letter "b", by which the protagonist reassures his interlocutor who was afraid by Changez's physical aspect. This sentence is immediately followed by "I'm a lover of America". This causes a contraddiction because even though the interlocutor is scared he drinks a cup of tea with the narrator.

"I'm both a native of the Nation and a speaker of your language" is the most relevant expression in the paragraph. It anticipates Changez's life experience, a continue effort to live between the two cultures that influenced him. In America he's both a native and a stranger. 

Finally, it is also important to underline that the protagonist recognizes his listener as an american "not by the color of your skin". That's really meaningful because somebody narrow-minded may immediately judge someone by the color of the skin.