Date format error in R using if condition? [duplicate]

my dt1 looks like

pateint_id  NAME    col1    col2    col3
 1001        aa       33    41       51
 1002        bb       34    42       52
 1003        cc       35    43       53
 1004        dd       36    44       54
 1005        ee       37    45       55
 1006        gg       38    46       56
 1007        ff       39    47       57
 1008        hh       40    48       58
 1009        kk       41    49       59
 1010        ll       42    50       60

my dt2 have record_date

pateint_id       NAME   Record_date
1001              aa    10-02-2004
1002              bb    25-09-2008
1005              ee    13-06-2005
1006              gg    15-07-2006

class(dt2$Record_date) POSIXct" "POSIXt

i want to match both patient id and get record date from the dt2 dataset

For that i used if condition but resulted in date format error

dt1$fdate <- ifelse(dt1$patient_id %in% dt2$patient_id,dt2$Record_date,NA)

output:

pateint_id      NAME    Record_date
1001             aa     38027
1002             bb     39716
1005             ee     38516
1006             gg     38913

Expected Output:

pateint_id  NAME    Record_date
1001         aa     10-02-2004
1002         bb     25-09-2008
1005         ee     13-06-2005
1006         gg     15-07-2006

Thank you in advance...