@airindiain I talked to them few minutes ago. There was wait period of more than an hour. They told me to contact embassy.
My apologies! But, If those flights are on your schedule why your website is showing "no flights" for the same dates.
@airindiain Thanks for the response. This schedule says two flights- may 10 and may 14 from Delhi to Chicago. But your website is not showing any flight for those dates. Please help me.