Thanks to all of you for sharing my problem. The duty TTE at NK has been sympathetic enough and allowed my daughter-in-law to travel in 1AC with her WL-1 ticket along with my son. But, the TTE assured a berth for my daughter-in-law only if he finds any berth vacant enroute. Till then, they have to share their confirmed single berth in 1AC. I shall receive them at LJN tomorrow morning. Thanks again to all of you.